56321550644 has 24 divisors (see below), whose sum is σ = 102406722600. Its totient is φ = 27070968960.

The previous prime is 56321550619. The next prime is 56321550683. The reversal of 56321550644 is 44605512365.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4525252900 + 51796297744 = 67270^2 + 227588^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033547 + ... + 1086674.

It is an arithmetic number, because the mean of its divisors is an integer number (4266946775).

Almost surely, 2^56321550644 is an apocalyptic number.

It is an amenable number.

56321550644 is a deficient number, since it is larger than the sum of its proper divisors (46085171956).

56321550644 is a wasteful number, since it uses less digits than its factorization.

56321550644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120483 (or 2120481 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 56321550644 in words is "fifty-six billion, three hundred twenty-one million, five hundred fifty thousand, six hundred forty-four".