624573945 has 12 divisors (see below), whose sum is σ = 1082594916. Its totient is φ = 333106080.

The previous prime is 624573919. The next prime is 624574003. The reversal of 624573945 is 549375426.

It can be written as a sum of positive squares in 2 ways, for example, as 86936976 + 537636969 = 9324^2 + 23187^2 .

It is not a de Polignac number, because 624573945 - 2⁶ = 624573881 is a prime.

It is a super-2 number, since 2×624573945² = 780185225545726050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 13879421 = 624573945 / (6 + 2 + 4 + 5 + 7 + 3 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 624573945.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6939666 + ... + 6939755.

It is an arithmetic number, because the mean of its divisors is an integer number (90216243).

Almost surely, 2^624573945 is an apocalyptic number.

It is an amenable number.

624573945 is a deficient number, since it is larger than the sum of its proper divisors (458020971).

624573945 is a wasteful number, since it uses less digits than its factorization.

624573945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13879432 (or 13879429 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 624573945 is about 24991.4774473219. The cubic root of 624573945 is about 854.7936508287.

The spelling of 624573945 in words is "six hundred twenty-four million, five hundred seventy-three thousand, nine hundred forty-five".