51557570756 has 12 divisors (see below), whose sum is σ = 91155911868. Its totient is φ = 25513024512.

The previous prime is 51557570747. The next prime is 51557570761. The reversal of 51557570756 is 65707575515.

It can be written as a sum of positive squares in 2 ways, for example, as 12821032900 + 38736537856 = 113230^2 + 196816^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51557570698 and 51557570707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66439781 + ... + 66440556.

It is an arithmetic number, because the mean of its divisors is an integer number (7596325989).

Almost surely, 2^51557570756 is an apocalyptic number.

It is an amenable number.

51557570756 is a deficient number, since it is larger than the sum of its proper divisors (39598341112).

51557570756 is a wasteful number, since it uses less digits than its factorization.

51557570756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132880438 (or 132880436 counting only the distinct ones).

The product of its (nonzero) digits is 6431250, while the sum is 53.

The spelling of 51557570756 in words is "fifty-one billion, five hundred fifty-seven million, five hundred seventy thousand, seven hundred fifty-six".