645424584 has 64 divisors (see below), whose sum is σ = 1952553600. Its totient is φ = 173558784.

The previous prime is 645424579. The next prime is 645424589. The reversal of 645424584 is 485424546.

It is an interprime number because it is at equal distance from previous prime (645424579) and next prime (645424589).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (645424589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110139 + ... + 115850.

It is an arithmetic number, because the mean of its divisors is an integer number (30508650).

Almost surely, 2^645424584 is an apocalyptic number.

It is an amenable number.

645424584 is an abundant number, since it is smaller than the sum of its proper divisors (1307129016).

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

645424584 is a wasteful number, since it uses less digits than its factorization.

645424584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226022 (or 226018 counting only the distinct ones).

The product of its digits is 614400, while the sum is 42.

The square root of 645424584 is about 25405.2078125726. The cubic root of 645424584 is about 864.2018025703.

The spelling of 645424584 in words is "six hundred forty-five million, four hundred twenty-four thousand, five hundred eighty-four".