57516112120681 has 2 divisors, whose sum is σ = 57516112120682. Its totient is φ = 57516112120680.

The previous prime is 57516112120667. The next prime is 57516112120703. The reversal of 57516112120681 is 18602121161575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39569874430681 + 17946237690000 = 6290459^2 + 4236300^2 .

It is a cyclic number.

It is not a de Polignac number, because 57516112120681 - 2¹³ = 57516112112489 is a prime.

It is a super-2 number, since 2×57516112120681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57516112120781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28758056060340 + 28758056060341.

It is an arithmetic number, because the mean of its divisors is an integer number (28758056060341).

Almost surely, 2^{57516112120681} is an apocalyptic number.

It is an amenable number.

57516112120681 is a deficient number, since it is larger than the sum of its proper divisors (1).

57516112120681 is an equidigital number, since it uses as much as digits as its factorization.

57516112120681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 46.

The spelling of 57516112120681 in words is "fifty-seven trillion, five hundred sixteen billion, one hundred twelve million, one hundred twenty thousand, six hundred eighty-one".