645606632204 has 6 divisors (see below), whose sum is σ = 1129811606364. Its totient is φ = 322803316100.

The previous prime is 645606632129. The next prime is 645606632233. The reversal of 645606632204 is 402236606546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80700829022 + ... + 80700829029.

It is an arithmetic number, because the mean of its divisors is an integer number (188301934394).

Almost surely, 2^645606632204 is an apocalyptic number.

It is an amenable number.

645606632204 is a deficient number, since it is larger than the sum of its proper divisors (484204974160).

645606632204 is a wasteful number, since it uses less digits than its factorization.

645606632204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161401658055 (or 161401658053 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 645606632204 in words is "six hundred forty-five billion, six hundred six million, six hundred thirty-two thousand, two hundred four".