51125577636656 has 20 divisors (see below), whose sum is σ = 99138837560232. Its totient is φ = 25541361492096.

The previous prime is 51125577636619. The next prime is 51125577636677. The reversal of 51125577636656 is 65663677552115.

It is a super-2 number, since 2×51125577636656² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51125577636592 and 51125577636601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339188206 + ... + 1339226381.

Almost surely, 2^{51125577636656} is an apocalyptic number.

It is an amenable number.

51125577636656 is a deficient number, since it is larger than the sum of its proper divisors (48013259923576).

51125577636656 is a wasteful number, since it uses less digits than its factorization.

51125577636656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678415788 (or 2678415782 counting only the distinct ones).

The product of its digits is 238140000, while the sum is 65.

The spelling of 51125577636656 in words is "fifty-one trillion, one hundred twenty-five billion, five hundred seventy-seven million, six hundred thirty-six thousand, six hundred fifty-six".