645434565324 has 24 divisors (see below), whose sum is σ = 1526644316400. Its totient is φ = 212197665024.

The previous prime is 645434565313. The next prime is 645434565337. The reversal of 645434565324 is 423565434546.

645434565324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645434565324² (a number of 24 digits) contains 22 as substring.

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, 368397849 + ... + 368399600.

It is an arithmetic number, because the mean of its divisors is an integer number (63610179850).

Almost surely, 2^645434565324 is an apocalyptic number.

It is an amenable number.

645434565324 is an abundant number, since it is smaller than the sum of its proper divisors (881209751076).

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

645434565324 is a wasteful number, since it uses less digits than its factorization.

645434565324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736797529 (or 736797527 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 51.

The spelling of 645434565324 in words is "six hundred forty-five billion, four hundred thirty-four million, five hundred sixty-five thousand, three hundred twenty-four".