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64194030720 = 2732511144797
BaseRepresentation
bin111011110010010000…
…110010110010000000
320010200210101122022100
4323302100302302000
52022432132440340
645253524510400
74431534154341
oct736220626200
9203623348270
1064194030720
1125251947456
121053654b400
136090625b81
14316d8b40c8
151a0aa53830
hexef2432c80

64194030720 has 96 divisors (see below), whose sum is σ = 221670032220. Its totient is φ = 17118406656.

The previous prime is 64194030697. The next prime is 64194030757. The reversal of 64194030720 is 2703049146.

64194030720 is a `hidden beast` number, since 641 + 9 + 4 + 0 + 3 + 0 + 7 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59610199104 + 4583831616 = 244152^2 + 67704^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5566639 + ... + 5578158.

Almost surely, 264194030720 is an apocalyptic number.

64194030720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64194030720 is an abundant number, since it is smaller than the sum of its proper divisors (157476001500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64194030720 is a wasteful number, since it uses less digits than its factorization.

64194030720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11144822 (or 11144807 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

Adding to 64194030720 its reverse (2703049146), we get a palindrome (66897079866).

The spelling of 64194030720 in words is "sixty-four billion, one hundred ninety-four million, thirty thousand, seven hundred twenty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 45 48 60 64 72 80 90 96 120 128 144 160 180 192 240 288 320 360 384 480 576 640 720 960 1152 1440 1920 2880 5760 11144797 22289594 33434391 44579188 55723985 66868782 89158376 100303173 111447970 133737564 167171955 178316752 200606346 222895940 267475128 334343910 356633504 401212692 445791880 501515865 534950256 668687820 713267008 802425384 891583760 1003031730 1069900512 1337375640 1426534016 1604850768 1783167520 2006063460 2139801024 2674751280 3209701536 3566335040 4012126920 4279602048 5349502560 6419403072 7132670080 8024253840 10699005120 12838806144 16048507680 21398010240 32097015360 64194030720