51625644656601 has 16 divisors (see below), whose sum is σ = 68851955997440. Its totient is φ = 34408215925200.

The previous prime is 51625644656587. The next prime is 51625644656633. The reversal of 51625644656601 is 10665644652615.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-51625644656601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51625644652601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211268670 + ... + 211512888.

It is an arithmetic number, because the mean of its divisors is an integer number (4303247249840).

Almost surely, 2^{51625644656601} is an apocalyptic number.

It is an amenable number.

51625644656601 is a deficient number, since it is larger than the sum of its proper divisors (17226311340839).

51625644656601 is a wasteful number, since it uses less digits than its factorization.

51625644656601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262116.

The product of its (nonzero) digits is 31104000, while the sum is 57.

The spelling of 51625644656601 in words is "fifty-one trillion, six hundred twenty-five billion, six hundred forty-four million, six hundred fifty-six thousand, six hundred one".