57621270431 has 4 divisors (see below), whose sum is σ = 57701412000. Its totient is φ = 57541128864.

The previous prime is 57621270409. The next prime is 57621270433. The reversal of 57621270431 is 13407212675.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57621270431 is a prime.

It is a super-2 number, since 2×57621270431² (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 (57621270433) 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, 40069706 + ... + 40071143.

It is an arithmetic number, because the mean of its divisors is an integer number (14425353000).

Almost surely, 2^57621270431 is an apocalyptic number.

57621270431 is a deficient number, since it is larger than the sum of its proper divisors (80141569).

57621270431 is an equidigital number, since it uses as much as digits as its factorization.

57621270431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80141568.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 57621270431 in words is "fifty-seven billion, six hundred twenty-one million, two hundred seventy thousand, four hundred thirty-one".