117157061657 has 2 divisors, whose sum is σ = 117157061658. Its totient is φ = 117157061656.

The previous prime is 117157061617. The next prime is 117157061663. The reversal of 117157061657 is 756160751711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60140695696 + 57016365961 = 245236^2 + 238781^2 .

It is a cyclic number.

It is not a de Polignac number, because 117157061657 - 2²⁰ = 117156013081 is a prime.

It is a super-2 number, since 2×117157061657² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117157061617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58578530828 + 58578530829.

It is an arithmetic number, because the mean of its divisors is an integer number (58578530829).

Almost surely, 2^117157061657 is an apocalyptic number.

It is an amenable number.

117157061657 is a deficient number, since it is larger than the sum of its proper divisors (1).

117157061657 is an equidigital number, since it uses as much as digits as its factorization.

117157061657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 308700, while the sum is 47.

The spelling of 117157061657 in words is "one hundred seventeen billion, one hundred fifty-seven million, sixty-one thousand, six hundred fifty-seven".