51511666056004 has 96 divisors (see below), whose sum is σ = 115100475420672. Its totient is φ = 19590901680000.

The previous prime is 51511666056001. The next prime is 51511666056047. The reversal of 51511666056004 is 40065066611515.

It is not an unprimeable number, because it can be changed into a prime (51511666056001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9452584 + ... + 13869919.

It is an arithmetic number, because the mean of its divisors is an integer number (1198963285632).

Almost surely, 2^{51511666056004} is an apocalyptic number.

It is an amenable number.

51511666056004 is an abundant number, since it is smaller than the sum of its proper divisors (63588809364668).

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

51511666056004 is a wasteful number, since it uses less digits than its factorization.

51511666056004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322697 (or 23322695 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 51511666056004 in words is "fifty-one trillion, five hundred eleven billion, six hundred sixty-six million, fifty-six thousand, four".