57051869581 has 6 divisors (see below), whose sum is σ = 66366460590. Its totient is φ = 48901602456.

The previous prime is 57051869579. The next prime is 57051869591. The reversal of 57051869581 is 18596815075.

It can be written as a sum of positive squares in only one way, i.e., 44873643556 + 12178226025 = 211834^2 + 110355^2 .

It is not a de Polignac number, because 57051869581 - 2¹ = 57051869579 is a prime.

It is a super-2 number, since 2×57051869581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57051869521) 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 in 5 ways as a sum of consecutive naturals, for example, 582161886 + ... + 582161983.

It is an arithmetic number, because the mean of its divisors is an integer number (11061076765).

Almost surely, 2^57051869581 is an apocalyptic number.

It is an amenable number.

57051869581 is a deficient number, since it is larger than the sum of its proper divisors (9314591009).

57051869581 is a wasteful number, since it uses less digits than its factorization.

57051869581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164323883 (or 1164323876 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 55.

The spelling of 57051869581 in words is "fifty-seven billion, fifty-one million, eight hundred sixty-nine thousand, five hundred eighty-one".