57162811681 has 2 divisors, whose sum is σ = 57162811682. Its totient is φ = 57162811680.

The previous prime is 57162811669. The next prime is 57162811691. The reversal of 57162811681 is 18611826175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39736435600 + 17426376081 = 199340^2 + 132009^2 .

It is a cyclic number.

It is not a de Polignac number, because 57162811681 - 2⁹ = 57162811169 is a prime.

It is a super-2 number, since 2×57162811681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57162811621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28581405840 + 28581405841.

It is an arithmetic number, because the mean of its divisors is an integer number (28581405841).

Almost surely, 2^57162811681 is an apocalyptic number.

It is an amenable number.

57162811681 is a deficient number, since it is larger than the sum of its proper divisors (1).

57162811681 is an equidigital number, since it uses as much as digits as its factorization.

57162811681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 46.

The spelling of 57162811681 in words is "fifty-seven billion, one hundred sixty-two million, eight hundred eleven thousand, six hundred eighty-one".