656761331157 has 16 divisors (see below), whose sum is σ = 882076016640. Its totient is φ = 434644441200.

The previous prime is 656761331153. The next prime is 656761331167. The reversal of 656761331157 is 751133167656.

656761331157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656761331157 - 2² = 656761331153 is a prime.

It is a super-2 number, since 2×656761331157² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656761331153) 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, 4061932 + ... + 4220522.

It is an arithmetic number, because the mean of its divisors is an integer number (55129751040).

Almost surely, 2^656761331157 is an apocalyptic number.

It is an amenable number.

656761331157 is a deficient number, since it is larger than the sum of its proper divisors (225314685483).

656761331157 is a wasteful number, since it uses less digits than its factorization.

656761331157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168664.

The product of its digits is 2381400, while the sum is 51.

The spelling of 656761331157 in words is "six hundred fifty-six billion, seven hundred sixty-one million, three hundred thirty-one thousand, one hundred fifty-seven".