51506560616 has 32 divisors (see below), whose sum is σ = 113063186880. Its totient is φ = 21535843200.

The previous prime is 51506560601. The next prime is 51506560619. The reversal of 51506560616 is 61606560515.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (51506560619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11214290 + ... + 11218881.

It is an arithmetic number, because the mean of its divisors is an integer number (3533224590).

Almost surely, 2^51506560616 is an apocalyptic number.

51506560616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51506560616 is an abundant number, since it is smaller than the sum of its proper divisors (61556626264).

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

51506560616 is a wasteful number, since it uses less digits than its factorization.

51506560616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22433225 (or 22433221 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 51506560616 in words is "fifty-one billion, five hundred six million, five hundred sixty thousand, six hundred sixteen".