Base | Representation |
---|---|
bin | 111011110010010000… |
… | …110010110010000000 |
3 | 20010200210101122022100 |
4 | 323302100302302000 |
5 | 2022432132440340 |
6 | 45253524510400 |
7 | 4431534154341 |
oct | 736220626200 |
9 | 203623348270 |
10 | 64194030720 |
11 | 25251947456 |
12 | 1053654b400 |
13 | 6090625b81 |
14 | 316d8b40c8 |
15 | 1a0aa53830 |
hex | ef2432c80 |
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".
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