56638042387 has 2 divisors, whose sum is σ = 56638042388. Its totient is φ = 56638042386.

The previous prime is 56638042319. The next prime is 56638042427. The reversal of 56638042387 is 78324083665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56638042387 - 2²⁷ = 56503824659 is a prime.

It is not a weakly prime, because it can be changed into another prime (56638042187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28319021193 + 28319021194.

It is an arithmetic number, because the mean of its divisors is an integer number (28319021194).

Almost surely, 2^56638042387 is an apocalyptic number.

56638042387 is a deficient number, since it is larger than the sum of its proper divisors (1).

56638042387 is an equidigital number, since it uses as much as digits as its factorization.

56638042387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 56638042387 in words is "fifty-six billion, six hundred thirty-eight million, forty-two thousand, three hundred eighty-seven".