645816024524 has 48 divisors (see below), whose sum is σ = 1286672325120. Its totient is φ = 280757811840.

The previous prime is 645816024517. The next prime is 645816024551. The reversal of 645816024524 is 425420618546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10405817 + ... + 10467695.

It is an arithmetic number, because the mean of its divisors is an integer number (26805673440).

Almost surely, 2^645816024524 is an apocalyptic number.

It is an amenable number.

645816024524 is a deficient number, since it is larger than the sum of its proper divisors (640856300596).

645816024524 is a wasteful number, since it uses less digits than its factorization.

645816024524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72230 (or 72228 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 47.

The spelling of 645816024524 in words is "six hundred forty-five billion, eight hundred sixteen million, twenty-four thousand, five hundred twenty-four".