51117557671 has 16 divisors (see below), whose sum is σ = 52776947520. Its totient is φ = 49492477440.

The previous prime is 51117557641. The next prime is 51117557677. The reversal of 51117557671 is 17675571115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51117557671 - 2²⁹ = 50580686759 is a prime.

It is a super-2 number, since 2×51117557671² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51117557677) 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, 845281 + ... + 903733.

It is an arithmetic number, because the mean of its divisors is an integer number (3298559220).

Almost surely, 2^51117557671 is an apocalyptic number.

51117557671 is a deficient number, since it is larger than the sum of its proper divisors (1659389849).

51117557671 is a wasteful number, since it uses less digits than its factorization.

51117557671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58746.

The product of its digits is 257250, while the sum is 46.

The spelling of 51117557671 in words is "fifty-one billion, one hundred seventeen million, five hundred fifty-seven thousand, six hundred seventy-one".