645327960 has 128 divisors (see below), whose sum is σ = 1976832000. Its totient is φ = 168500736.

The previous prime is 645327959. The next prime is 645327979. The reversal of 645327960 is 69723546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1347001 + ... + 1347479.

It is an arithmetic number, because the mean of its divisors is an integer number (15444000).

Almost surely, 2^645327960 is an apocalyptic number.

645327960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645327960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988416000).

645327960 is an abundant number, since it is smaller than the sum of its proper divisors (1331504040).

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

645327960 is a wasteful number, since it uses less digits than its factorization.

645327960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 645327960 is about 25403.3060840513. The cubic root of 645327960 is about 864.1586749897.

The spelling of 645327960 in words is "six hundred forty-five million, three hundred twenty-seven thousand, nine hundred sixty".