56445758643 has 4 divisors (see below), whose sum is σ = 75261011528. Its totient is φ = 37630505760.

The previous prime is 56445758587. The next prime is 56445758671. The reversal of 56445758643 is 34685754465.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56445758643 - 2⁸ = 56445758387 is a prime.

It is a super-2 number, since 2×56445758643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56445708643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9407626438 + ... + 9407626443.

It is an arithmetic number, because the mean of its divisors is an integer number (18815252882).

Almost surely, 2^56445758643 is an apocalyptic number.

56445758643 is a deficient number, since it is larger than the sum of its proper divisors (18815252885).

56445758643 is a wasteful number, since it uses less digits than its factorization.

56445758643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18815252884.

The product of its digits is 48384000, while the sum is 57.

The spelling of 56445758643 in words is "fifty-six billion, four hundred forty-five million, seven hundred fifty-eight thousand, six hundred forty-three".