51688610831377 has 12 divisors (see below), whose sum is σ = 55976867315184. Its totient is φ = 47707142436720.

The previous prime is 51688610831359. The next prime is 51688610831423. The reversal of 51688610831377 is 77313801688615.

It is a de Polignac number, because none of the positive numbers 2^k-51688610831377 is a prime.

It is a super-2 number, since 2×51688610831377² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15884199 + ... + 18859612.

It is an arithmetic number, because the mean of its divisors is an integer number (4664738942932).

Almost surely, 2^{51688610831377} is an apocalyptic number.

It is an amenable number.

51688610831377 is a deficient number, since it is larger than the sum of its proper divisors (4288256483807).

51688610831377 is a wasteful number, since it uses less digits than its factorization.

51688610831377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34752640 (or 34752627 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 64.

The spelling of 51688610831377 in words is "fifty-one trillion, six hundred eighty-eight billion, six hundred ten million, eight hundred thirty-one thousand, three hundred seventy-seven".