12945402816 has 28 divisors (see below), whose sum is σ = 34251378792. Its totient is φ = 4315134208.

The previous prime is 12945402803. The next prime is 12945402851. The reversal of 12945402816 is 61820454921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33711795 + ... + 33712178.

Almost surely, 2^12945402816 is an apocalyptic number.

12945402816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12945402816 is an abundant number, since it is smaller than the sum of its proper divisors (21305975976).

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

12945402816 is an equidigital number, since it uses as much as digits as its factorization.

12945402816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67423988 (or 67423978 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 12945402816 in words is "twelve billion, nine hundred forty-five million, four hundred two thousand, eight hundred sixteen".