57138564251 has 8 divisors (see below), whose sum is σ = 60366496320. Its totient is φ = 53994474688.

The previous prime is 57138564239. The next prime is 57138564377. The reversal of 57138564251 is 15246583175.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57138564251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57138564196 and 57138564205.

It is not an unprimeable number, because it can be changed into a prime (57138564851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20959226 + ... + 20961951.

It is an arithmetic number, because the mean of its divisors is an integer number (7545812040).

Almost surely, 2^57138564251 is an apocalyptic number.

57138564251 is a deficient number, since it is larger than the sum of its proper divisors (3227932069).

57138564251 is a wasteful number, since it uses less digits than its factorization.

57138564251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41921253.

The product of its digits is 1008000, while the sum is 47.

The spelling of 57138564251 in words is "fifty-seven billion, one hundred thirty-eight million, five hundred sixty-four thousand, two hundred fifty-one".