51625621808 has 80 divisors (see below), whose sum is σ = 104514623136. Its totient is φ = 24681646080.

The previous prime is 51625621763. The next prime is 51625621813. The reversal of 51625621808 is 80812652615.

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, 19725716 + ... + 19728332.

Almost surely, 2^51625621808 is an apocalyptic number.

It is an amenable number.

51625621808 is an abundant number, since it is smaller than the sum of its proper divisors (52889001328).

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

51625621808 is a wasteful number, since it uses less digits than its factorization.

51625621808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3262 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 51625621808 in words is "fifty-one billion, six hundred twenty-five million, six hundred twenty-one thousand, eight hundred eight".