645235957824 has 28 divisors (see below), whose sum is σ = 1707186805584. Its totient is φ = 215078652544.

The previous prime is 645235957781. The next prime is 645235957841. The reversal of 645235957824 is 428759532546.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680301782 + ... + 1680302165.

Almost surely, 2^645235957824 is an apocalyptic number.

645235957824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

645235957824 is an abundant number, since it is smaller than the sum of its proper divisors (1061950847760).

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

645235957824 is a wasteful number, since it uses less digits than its factorization.

645235957824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360603962 (or 3360603952 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 60.

The spelling of 645235957824 in words is "six hundred forty-five billion, two hundred thirty-five million, nine hundred fifty-seven thousand, eight hundred twenty-four".