645884524 has 12 divisors (see below), whose sum is σ = 1137067344. Its totient is φ = 321008144.

The previous prime is 645884513. The next prime is 645884527. The reversal of 645884524 is 425488546.

It is not an unprimeable number, because it can be changed into a prime (645884527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482779 + ... + 484114.

It is an arithmetic number, because the mean of its divisors is an integer number (94755612).

Almost surely, 2^645884524 is an apocalyptic number.

It is an amenable number.

645884524 is a deficient number, since it is larger than the sum of its proper divisors (491182820).

645884524 is a wasteful number, since it uses less digits than its factorization.

645884524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967064 (or 967062 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 46.

The square root of 645884524 is about 25414.2582815238. The cubic root of 645884524 is about 864.4070352224.

The spelling of 645884524 in words is "six hundred forty-five million, eight hundred eighty-four thousand, five hundred twenty-four".