15513332256 has 72 divisors (see below), whose sum is σ = 44611798140. Its totient is φ = 5112999936.

The previous prime is 15513332203. The next prime is 15513332279. The reversal of 15513332256 is 65223331551.

15513332256 is a `hidden beast` number, since 1 + 551 + 3 + 33 + 22 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13568522256 + 1944810000 = 116484^2 + 44100^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a self number, because there is not a number n which added to its sum of digits gives 15513332256.

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, 276985 + ... + 328248.

Almost surely, 2^15513332256 is an apocalyptic number.

15513332256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15513332256 is an abundant number, since it is smaller than the sum of its proper divisors (29098465884).

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

15513332256 is a wasteful number, since it uses less digits than its factorization.

15513332256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605338 (or 605327 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The spelling of 15513332256 in words is "fifteen billion, five hundred thirteen million, three hundred thirty-two thousand, two hundred fifty-six".