51656711015757 has 8 divisors (see below), whose sum is σ = 68876591250400. Its totient is φ = 34437319062480.

The previous prime is 51656711015659. The next prime is 51656711015821. The reversal of 51656711015757 is 75751011765615.

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

It is not a de Polignac number, because 51656711015757 - 2¹¹ = 51656711013709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51656711015697 and 51656711015706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656711055757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121823419 + ... + 122246712.

It is an arithmetic number, because the mean of its divisors is an integer number (8609573906300).

Almost surely, 2^{51656711015757} is an apocalyptic number.

It is an amenable number.

51656711015757 is a deficient number, since it is larger than the sum of its proper divisors (17219880234643).

51656711015757 is a wasteful number, since it uses less digits than its factorization.

51656711015757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244140683.

The product of its (nonzero) digits is 7717500, while the sum is 57.

The spelling of 51656711015757 in words is "fifty-one trillion, six hundred fifty-six billion, seven hundred eleven million, fifteen thousand, seven hundred fifty-seven".