645160872 has 32 divisors (see below), whose sum is σ = 1613731680. Its totient is φ = 214943040.

The previous prime is 645160861. The next prime is 645160927. The reversal of 645160872 is 278061546.

It is a self number, because there is not a number n which added to its sum of digits gives 645160872.

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, 50443 + ... + 61925.

It is an arithmetic number, because the mean of its divisors is an integer number (50429115).

Almost surely, 2^645160872 is an apocalyptic number.

It is an amenable number.

645160872 is an abundant number, since it is smaller than the sum of its proper divisors (968570808).

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

645160872 is a wasteful number, since it uses less digits than its factorization.

645160872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13833 (or 13829 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 645160872 is about 25400.0171653485. The cubic root of 645160872 is about 864.0840860379.

The spelling of 645160872 in words is "six hundred forty-five million, one hundred sixty thousand, eight hundred seventy-two".