57037663021 has 4 divisors (see below), whose sum is σ = 57282460092. Its totient is φ = 56792865952.

The previous prime is 57037662923. The next prime is 57037663031. The reversal of 57037663021 is 12036673075.

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 4236057225 + 52801605796 = 65085^2 + 229786^2 .

It is a cyclic number.

It is not a de Polignac number, because 57037663021 - 2²³ = 57029274413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57037663031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122398186 + ... + 122398651.

It is an arithmetic number, because the mean of its divisors is an integer number (14320615023).

Almost surely, 2^57037663021 is an apocalyptic number.

It is an amenable number.

57037663021 is a deficient number, since it is larger than the sum of its proper divisors (244797071).

57037663021 is a wasteful number, since it uses less digits than its factorization.

57037663021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244797070.

The product of its (nonzero) digits is 158760, while the sum is 40.

The spelling of 57037663021 in words is "fifty-seven billion, thirty-seven million, six hundred sixty-three thousand, twenty-one".