51125577636655 has 8 divisors (see below), whose sum is σ = 61625808381312. Its totient is φ = 40717051964448.

The previous prime is 51125577636619. The next prime is 51125577636677. The reversal of 51125577636655 is 55663677552115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51125577636655 - 2⁹ = 51125577636143 is a prime.

It is a super-2 number, since 2×51125577636655² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22926266884 + ... + 22926269113.

It is an arithmetic number, because the mean of its divisors is an integer number (7703226047664).

Almost surely, 2^{51125577636655} is an apocalyptic number.

51125577636655 is a deficient number, since it is larger than the sum of its proper divisors (10500230744657).

51125577636655 is a wasteful number, since it uses less digits than its factorization.

51125577636655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45852536225.

The product of its digits is 198450000, while the sum is 64.

The spelling of 51125577636655 in words is "fifty-one trillion, one hundred twenty-five billion, five hundred seventy-seven million, six hundred thirty-six thousand, six hundred fifty-five".