51521267625 has 64 divisors (see below), whose sum is σ = 88661833728. Its totient is φ = 26542080000.

The previous prime is 51521267621. The next prime is 51521267627. The reversal of 51521267625 is 52676212515.

It is not a de Polignac number, because 51521267625 - 2² = 51521267621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51521267621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6703785 + ... + 6711465.

It is an arithmetic number, because the mean of its divisors is an integer number (1385341152).

Almost surely, 2^51521267625 is an apocalyptic number.

It is an amenable number.

51521267625 is a deficient number, since it is larger than the sum of its proper divisors (37140566103).

51521267625 is a wasteful number, since it uses less digits than its factorization.

51521267625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8307 (or 8297 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The spelling of 51521267625 in words is "fifty-one billion, five hundred twenty-one million, two hundred sixty-seven thousand, six hundred twenty-five".