645111607204 has 24 divisors (see below), whose sum is σ = 1206762334848. Its totient is φ = 301006474560.

The previous prime is 645111607193. The next prime is 645111607223. The reversal of 645111607204 is 402706111546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85509432 + ... + 85516975.

It is an arithmetic number, because the mean of its divisors is an integer number (50281763952).

Almost surely, 2^645111607204 is an apocalyptic number.

It is an amenable number.

645111607204 is a deficient number, since it is larger than the sum of its proper divisors (561650727644).

645111607204 is a wasteful number, since it uses less digits than its factorization.

645111607204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171026475 (or 171026473 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 645111607204 in words is "six hundred forty-five billion, one hundred eleven million, six hundred seven thousand, two hundred four".