51013957253568 has 112 divisors (see below), whose sum is σ = 136073558200320. Its totient is φ = 16866250942464.

The previous prime is 51013957253549. The next prime is 51013957253573. The reversal of 51013957253568 is 86535275931015.

It is a super-2 number, since 2×51013957253568² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91625755 + ... + 92180837.

Almost surely, 2^{51013957253568} 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 51013957253568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68036779100160).

51013957253568 is an abundant number, since it is smaller than the sum of its proper divisors (85059600946752).

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

51013957253568 is a wasteful number, since it uses less digits than its factorization.

51013957253568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558994 (or 558984 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 60.

The spelling of 51013957253568 in words is "fifty-one trillion, thirteen billion, nine hundred fifty-seven million, two hundred fifty-three thousand, five hundred sixty-eight".