57812873581 has 2 divisors, whose sum is σ = 57812873582. Its totient is φ = 57812873580.

The previous prime is 57812873563. The next prime is 57812873597. The reversal of 57812873581 is 18537821875.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57058876900 + 753996681 = 238870^2 + 27459^2 .

It is a cyclic number.

It is not a de Polignac number, because 57812873581 - 2⁵ = 57812873549 is a prime.

It is a super-2 number, since 2×57812873581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57812873551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28906436790 + 28906436791.

It is an arithmetic number, because the mean of its divisors is an integer number (28906436791).

Almost surely, 2^57812873581 is an apocalyptic number.

It is an amenable number.

57812873581 is a deficient number, since it is larger than the sum of its proper divisors (1).

57812873581 is an equidigital number, since it uses as much as digits as its factorization.

57812873581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 55.

The spelling of 57812873581 in words is "fifty-seven billion, eight hundred twelve million, eight hundred seventy-three thousand, five hundred eighty-one".