56728752639 has 32 divisors (see below), whose sum is σ = 83430466560. Its totient is φ = 34068388992.

The previous prime is 56728752623. The next prime is 56728752677. The reversal of 56728752639 is 93625782765.

It is not a de Polignac number, because 56728752639 - 2⁴ = 56728752623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56728752239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591457 + ... + 680645.

It is an arithmetic number, because the mean of its divisors is an integer number (2607202080).

Almost surely, 2^56728752639 is an apocalyptic number.

56728752639 is a deficient number, since it is larger than the sum of its proper divisors (26701713921).

56728752639 is a wasteful number, since it uses less digits than its factorization.

56728752639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89599.

The product of its digits is 38102400, while the sum is 60.

The spelling of 56728752639 in words is "fifty-six billion, seven hundred twenty-eight million, seven hundred fifty-two thousand, six hundred thirty-nine".