57126585665 has 4 divisors (see below), whose sum is σ = 68551902804. Its totient is φ = 45701268528.

The previous prime is 57126585653. The next prime is 57126585673. The reversal of 57126585665 is 56658562175.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28458677809 + 28667907856 = 168697^2 + 169316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57126585665 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57126585665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5712658562 + ... + 5712658571.

It is an arithmetic number, because the mean of its divisors is an integer number (17137975701).

Almost surely, 2^57126585665 is an apocalyptic number.

It is an amenable number.

57126585665 is a deficient number, since it is larger than the sum of its proper divisors (11425317139).

57126585665 is a wasteful number, since it uses less digits than its factorization.

57126585665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11425317138.

The product of its digits is 15120000, while the sum is 56.

The spelling of 57126585665 in words is "fifty-seven billion, one hundred twenty-six million, five hundred eighty-five thousand, six hundred sixty-five".