645600602604 has 12 divisors (see below), whose sum is σ = 1506401406104. Its totient is φ = 215200200864.

The previous prime is 645600602533. The next prime is 645600602611. The reversal of 645600602604 is 406206006546.

645600602604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 26900025097 + ... + 26900025120.

Almost surely, 2^645600602604 is an apocalyptic number.

It is an amenable number.

645600602604 is an abundant number, since it is smaller than the sum of its proper divisors (860800803500).

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

645600602604 is a wasteful number, since it uses less digits than its factorization.

645600602604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53800050224 (or 53800050222 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 645600602604 in words is "six hundred forty-five billion, six hundred million, six hundred two thousand, six hundred four".