56439016645 has 32 divisors (see below), whose sum is σ = 74662922880. Its totient is φ = 40614240000.

The previous prime is 56439016643. The next prime is 56439016663. The reversal of 56439016645 is 54661093465.

It is not a de Polignac number, because 56439016645 - 2¹ = 56439016643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56439016643) 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, 14768835 + ... + 14772655.

It is an arithmetic number, because the mean of its divisors is an integer number (2333216340).

Almost surely, 2^56439016645 is an apocalyptic number.

56439016645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56439016645 is a deficient number, since it is larger than the sum of its proper divisors (18223906235).

56439016645 is a wasteful number, since it uses less digits than its factorization.

56439016645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 56439016645 in words is "fifty-six billion, four hundred thirty-nine million, sixteen thousand, six hundred forty-five".