51756561711120 has 160 divisors (see below), whose sum is σ = 183488930456832. Its totient is φ = 11822146983936.

The previous prime is 51756561711119. The next prime is 51756561711131. The reversal of 51756561711120 is 2111716565715.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51756561711120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7809067 + ... + 12825546.

Almost surely, 2^{51756561711120} is an apocalyptic number.

It is an amenable number.

51756561711120 is an abundant number, since it is smaller than the sum of its proper divisors (131732368745712).

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

51756561711120 is a wasteful number, since it uses less digits than its factorization.

51756561711120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20636129 (or 20636123 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 48.

The spelling of 51756561711120 in words is "fifty-one trillion, seven hundred fifty-six billion, five hundred sixty-one million, seven hundred eleven thousand, one hundred twenty".