57709081117 has 2 divisors, whose sum is σ = 57709081118. Its totient is φ = 57709081116.

The previous prime is 57709081069. The next prime is 57709081139. The reversal of 57709081117 is 71118090775.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30973888036 + 26735193081 = 175994^2 + 163509^2 .

It is a cyclic number.

It is not a de Polignac number, because 57709081117 - 2²³ = 57700692509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57709081517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28854540558 + 28854540559.

It is an arithmetic number, because the mean of its divisors is an integer number (28854540559).

Almost surely, 2^57709081117 is an apocalyptic number.

It is an amenable number.

57709081117 is a deficient number, since it is larger than the sum of its proper divisors (1).

57709081117 is an equidigital number, since it uses as much as digits as its factorization.

57709081117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 46.

The spelling of 57709081117 in words is "fifty-seven billion, seven hundred nine million, eighty-one thousand, one hundred seventeen".