645053464 has 16 divisors (see below), whose sum is σ = 1319427720. Its totient is φ = 293206080.

The previous prime is 645053443. The next prime is 645053537. The reversal of 645053464 is 464350546.

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, 3664989 + ... + 3665164.

Almost surely, 2^645053464 is an apocalyptic number.

It is an amenable number.

645053464 is an abundant number, since it is smaller than the sum of its proper divisors (674374256).

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

645053464 is a wasteful number, since it uses less digits than its factorization.

645053464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7330170 (or 7330166 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 645053464 is about 25397.9027480617. The cubic root of 645053464 is about 864.0361317480.

The spelling of 645053464 in words is "six hundred forty-five million, fifty-three thousand, four hundred sixty-four".