51564526521016 has 16 divisors (see below), whose sum is σ = 96683578336800. Its totient is φ = 25782238964544.

The previous prime is 51564526520981. The next prime is 51564526521017. The reversal of 51564526521016 is 61012562546515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51564526521017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8610801 + ... + 13314463.

It is an arithmetic number, because the mean of its divisors is an integer number (6042723646050).

Almost surely, 2^{51564526521016} is an apocalyptic number.

It is an amenable number.

51564526521016 is a deficient number, since it is larger than the sum of its proper divisors (45119051815784).

51564526521016 is a wasteful number, since it uses less digits than its factorization.

51564526521016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073998 (or 6073994 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 49.

The spelling of 51564526521016 in words is "fifty-one trillion, five hundred sixty-four billion, five hundred twenty-six million, five hundred twenty-one thousand, sixteen".