12646646565220 has 24 divisors (see below), whose sum is σ = 26560962792000. Its totient is φ = 5058086244192.

The previous prime is 12646646565181. The next prime is 12646646565253. The reversal of 12646646565220 is 2256564664621.

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, 35592670 + ... + 35946229.

It is an arithmetic number, because the mean of its divisors is an integer number (1106706783000).

Almost surely, 2^{12646646565220} is an apocalyptic number.

12646646565220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12646646565220 is an abundant number, since it is smaller than the sum of its proper divisors (13914316226780).

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

12646646565220 is a wasteful number, since it uses less digits than its factorization.

12646646565220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71547747 (or 71547745 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 55.

The spelling of 12646646565220 in words is "twelve trillion, six hundred forty-six billion, six hundred forty-six million, five hundred sixty-five thousand, two hundred twenty".