645584496 has 20 divisors (see below), whose sum is σ = 1667760072. Its totient is φ = 215194816.

The previous prime is 645584477. The next prime is 645584519. The reversal of 645584496 is 694485546.

It is a congruent number.

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, 6724791 + ... + 6724886.

Almost surely, 2^645584496 is an apocalyptic number.

It is an amenable number.

645584496 is an abundant number, since it is smaller than the sum of its proper divisors (1022175576).

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

645584496 is a wasteful number, since it uses less digits than its factorization.

645584496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13449688 (or 13449682 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The square root of 645584496 is about 25408.3548463886. The cubic root of 645584496 is about 864.2731689392.

It can be divided in two parts, 6455 and 84496, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 645584496 in words is "six hundred forty-five million, five hundred eighty-four thousand, four hundred ninety-six".