57135881657 has 4 divisors (see below), whose sum is σ = 57519344100. Its totient is φ = 56752419216.

The previous prime is 57135881639. The next prime is 57135881683. The reversal of 57135881657 is 75618853175.

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 38107334521 + 19028547136 = 195211^2 + 137944^2 .

It is a cyclic number.

It is not a de Polignac number, because 57135881657 - 2¹⁶ = 57135816121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57135887657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191730998 + ... + 191731295.

It is an arithmetic number, because the mean of its divisors is an integer number (14379836025).

Almost surely, 2^57135881657 is an apocalyptic number.

It is an amenable number.

57135881657 is a deficient number, since it is larger than the sum of its proper divisors (383462443).

57135881657 is a wasteful number, since it uses less digits than its factorization.

57135881657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383462442.

The product of its digits is 7056000, while the sum is 56.

The spelling of 57135881657 in words is "fifty-seven billion, one hundred thirty-five million, eight hundred eighty-one thousand, six hundred fifty-seven".