57581991871 has 2 divisors, whose sum is σ = 57581991872. Its totient is φ = 57581991870.

The previous prime is 57581991833. The next prime is 57581991893. The reversal of 57581991871 is 17819918575.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57581991871 - 2⁹ = 57581991359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57582991871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28790995935 + 28790995936.

It is an arithmetic number, because the mean of its divisors is an integer number (28790995936).

Almost surely, 2^57581991871 is an apocalyptic number.

57581991871 is a deficient number, since it is larger than the sum of its proper divisors (1).

57581991871 is an equidigital number, since it uses as much as digits as its factorization.

57581991871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 61.

The spelling of 57581991871 in words is "fifty-seven billion, five hundred eighty-one million, nine hundred ninety-one thousand, eight hundred seventy-one".