51617545625 has 20 divisors (see below), whose sum is σ = 64629911808. Its totient is φ = 41211690000.

The previous prime is 51617545589. The next prime is 51617545633. The reversal of 51617545625 is 52654571615.

It is not a de Polignac number, because 51617545625 - 2²⁴ = 51600768409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51617545625.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 232280 + ... + 396470.

Almost surely, 2^51617545625 is an apocalyptic number.

It is an amenable number.

51617545625 is a deficient number, since it is larger than the sum of its proper divisors (13012366183).

51617545625 is an equidigital number, since it uses as much as digits as its factorization.

51617545625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164714 (or 164699 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 47.

The spelling of 51617545625 in words is "fifty-one billion, six hundred seventeen million, five hundred forty-five thousand, six hundred twenty-five".