56644259013 has 16 divisors (see below), whose sum is σ = 85964188800. Its totient is φ = 36841793760.

The previous prime is 56644259011. The next prime is 56644259017. The reversal of 56644259013 is 31095244665.

56644259013 is a `hidden beast` number, since 5 + 6 + 6 + 4 + 42 + 590 + 13 = 666.

It is not a de Polignac number, because 56644259013 - 2¹ = 56644259011 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 56644259013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56644259011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25583473 + ... + 25585686.

It is an arithmetic number, because the mean of its divisors is an integer number (5372761800).

Almost surely, 2^56644259013 is an apocalyptic number.

It is an amenable number.

56644259013 is a deficient number, since it is larger than the sum of its proper divisors (29319929787).

56644259013 is a wasteful number, since it uses less digits than its factorization.

56644259013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51169209 (or 51169203 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 56644259013 in words is "fifty-six billion, six hundred forty-four million, two hundred fifty-nine thousand, thirteen".