57161812517 has 2 divisors, whose sum is σ = 57161812518. Its totient is φ = 57161812516.

The previous prime is 57161812483. The next prime is 57161812549. The reversal of 57161812517 is 71521816175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46877013121 + 10284799396 = 216511^2 + 101414^2 .

It is a cyclic number.

It is not a de Polignac number, because 57161812517 - 2²² = 57157618213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57161812567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28580906258 + 28580906259.

It is an arithmetic number, because the mean of its divisors is an integer number (28580906259).

Almost surely, 2^57161812517 is an apocalyptic number.

It is an amenable number.

57161812517 is a deficient number, since it is larger than the sum of its proper divisors (1).

57161812517 is an equidigital number, since it uses as much as digits as its factorization.

57161812517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 44.

The spelling of 57161812517 in words is "fifty-seven billion, one hundred sixty-one million, eight hundred twelve thousand, five hundred seventeen".