57261984691 has 2 divisors, whose sum is σ = 57261984692. Its totient is φ = 57261984690.

The previous prime is 57261984581. The next prime is 57261984737. The reversal of 57261984691 is 19648916275.

57261984691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57261984691 - 2¹⁷ = 57261853619 is a prime.

It is not a weakly prime, because it can be changed into another prime (57261985691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28630992345 + 28630992346.

It is an arithmetic number, because the mean of its divisors is an integer number (28630992346).

Almost surely, 2^57261984691 is an apocalyptic number.

57261984691 is a deficient number, since it is larger than the sum of its proper divisors (1).

57261984691 is an equidigital number, since it uses as much as digits as its factorization.

57261984691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 58.

The spelling of 57261984691 in words is "fifty-seven billion, two hundred sixty-one million, nine hundred eighty-four thousand, six hundred ninety-one".