13451644812 has 12 divisors (see below), whose sum is σ = 31387171256. Its totient is φ = 4483881600.

The previous prime is 13451644753. The next prime is 13451644819. The reversal of 13451644812 is 21844615431.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (13451644819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560485189 + ... + 560485212.

Almost surely, 2^13451644812 is an apocalyptic number.

13451644812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13451644812 is an abundant number, since it is smaller than the sum of its proper divisors (17935526444).

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

13451644812 is a wasteful number, since it uses less digits than its factorization.

13451644812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120970408 (or 1120970406 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The spelling of 13451644812 in words is "thirteen billion, four hundred fifty-one million, six hundred forty-four thousand, eight hundred twelve".