56864828639 has 2 divisors, whose sum is σ = 56864828640. Its totient is φ = 56864828638.

The previous prime is 56864828633. The next prime is 56864828723. The reversal of 56864828639 is 93682846865.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56864828639 is a prime.

It is a super-2 number, since 2×56864828639² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56864828633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28432414319 + 28432414320.

It is an arithmetic number, because the mean of its divisors is an integer number (28432414320).

Almost surely, 2^56864828639 is an apocalyptic number.

56864828639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56864828639 is an equidigital number, since it uses as much as digits as its factorization.

56864828639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119439360, while the sum is 65.

The spelling of 56864828639 in words is "fifty-six billion, eight hundred sixty-four million, eight hundred twenty-eight thousand, six hundred thirty-nine".