56748985639 has 2 divisors, whose sum is σ = 56748985640. Its totient is φ = 56748985638.

The previous prime is 56748985603. The next prime is 56748985663. The reversal of 56748985639 is 93658984765.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56748985639 - 2⁹ = 56748985127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56748985339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28374492819 + 28374492820.

It is an arithmetic number, because the mean of its divisors is an integer number (28374492820).

Almost surely, 2^56748985639 is an apocalyptic number.

56748985639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56748985639 is an equidigital number, since it uses as much as digits as its factorization.

56748985639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 391910400, while the sum is 70.

The spelling of 56748985639 in words is "fifty-six billion, seven hundred forty-eight million, nine hundred eighty-five thousand, six hundred thirty-nine".