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65393910380 = 22531106399223
BaseRepresentation
bin111100111001110001…
…111110001001101100
320020210102011211202202
4330321301332021230
52032411320113010
650012550241032
74503344031641
oct747161761154
9206712154682
1065393910380
1125808180837
1210810356178
1362220a7636
143244db1dc8
151a7b0686a5
hexf39c7e26c

65393910380 has 48 divisors (see below), whose sum is σ = 141891907584. Its totient is φ = 25289703360.

The previous prime is 65393910377. The next prime is 65393910389. The reversal of 65393910380 is 8301939356.

It is not an unprimeable number, because it can be changed into a prime (65393910389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609449 + ... + 708671.

It is an arithmetic number, because the mean of its divisors is an integer number (2956081408).

Almost surely, 265393910380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65393910380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70945953792).

65393910380 is an abundant number, since it is smaller than the sum of its proper divisors (76497997204).

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

65393910380 is a wasteful number, since it uses less digits than its factorization.

65393910380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100326 (or 100324 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 65393910380 in words is "sixty-five billion, three hundred ninety-three million, nine hundred ten thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 31 62 124 155 310 620 1063 2126 4252 5315 10630 21260 32953 65906 99223 131812 164765 198446 329530 396892 496115 659060 992230 1984460 3075913 6151826 12303652 15379565 30759130 61518260 105474049 210948098 421896196 527370245 1054740490 2109480980 3269695519 6539391038 13078782076 16348477595 32696955190 65393910380