646795590018 has 16 divisors (see below), whose sum is σ = 1293732650496. Its totient is φ = 215574951600.

The previous prime is 646795589977. The next prime is 646795590043. The reversal of 646795590018 is 810095597646.

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, 5835121 + ... + 5944932.

It is an arithmetic number, because the mean of its divisors is an integer number (80858290656).

Almost surely, 2^646795590018 is an apocalyptic number.

646795590018 is an abundant number, since it is smaller than the sum of its proper divisors (646937060478).

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

646795590018 is a wasteful number, since it uses less digits than its factorization.

646795590018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11789209.

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 646795590018 in words is "six hundred forty-six billion, seven hundred ninety-five million, five hundred ninety thousand, eighteen".