12645428641792 has 120 divisors (see below), whose sum is σ = 25585755969312. Its totient is φ = 6249185280000.

The previous prime is 12645428641721. The next prime is 12645428641843. The reversal of 12645428641792 is 29714682454621.

It is a self number, because there is not a number n which added to its sum of digits gives 12645428641792.

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, 538710568 + ... + 538734040.

Almost surely, 2^{12645428641792} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12645428641792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12792877984656).

12645428641792 is an abundant number, since it is smaller than the sum of its proper divisors (12940327327520).

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

12645428641792 is an equidigital number, since it uses as much as digits as its factorization.

12645428641792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23883 (or 23857 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 61.

The spelling of 12645428641792 in words is "twelve trillion, six hundred forty-five billion, four hundred twenty-eight million, six hundred forty-one thousand, seven hundred ninety-two".