56402365644 has 18 divisors (see below), whose sum is σ = 142572646580. Its totient is φ = 18800788536.

The previous prime is 56402365633. The next prime is 56402365667. The reversal of 56402365644 is 44656320465.

It is a happy number.

56402365644 is a `hidden beast` number, since 5 + 64 + 0 + 23 + 6 + 564 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 56402365644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 783366154 + ... + 783366225.

Almost surely, 2^56402365644 is an apocalyptic number.

It is an amenable number.

56402365644 is an abundant number, since it is smaller than the sum of its proper divisors (86170280936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56402365644 is a wasteful number, since it uses less digits than its factorization.

56402365644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566732389 (or 1566732384 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 56402365644 in words is "fifty-six billion, four hundred two million, three hundred sixty-five thousand, six hundred forty-four".