56657790379 has 2 divisors, whose sum is σ = 56657790380. Its totient is φ = 56657790378.

The previous prime is 56657790353. The next prime is 56657790391. The reversal of 56657790379 is 97309775665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56657790379 - 2²⁵ = 56624235947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56657790379.

It is not a weakly prime, because it can be changed into another prime (56657890379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328895189 + 28328895190.

It is an arithmetic number, because the mean of its divisors is an integer number (28328895190).

Almost surely, 2^56657790379 is an apocalyptic number.

56657790379 is a deficient number, since it is larger than the sum of its proper divisors (1).

56657790379 is an equidigital number, since it uses as much as digits as its factorization.

56657790379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75014100, while the sum is 64.

The spelling of 56657790379 in words is "fifty-six billion, six hundred fifty-seven million, seven hundred ninety thousand, three hundred seventy-nine".