13581264816 has 100 divisors (see below), whose sum is σ = 44923596432. Its totient is φ = 3880358784.

The previous prime is 13581264803. The next prime is 13581264877. The reversal of 13581264816 is 61846218531.

13581264816 is a `hidden beast` number, since 1 + 3 + 581 + 2 + 64 + 8 + 1 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 739455 + ... + 757598.

Almost surely, 2^13581264816 is an apocalyptic number.

13581264816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13581264816 is an abundant number, since it is smaller than the sum of its proper divisors (31342331616).

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

13581264816 is a wasteful number, since it uses less digits than its factorization.

13581264816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497080 (or 1497065 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 13581264816 in words is "thirteen billion, five hundred eighty-one million, two hundred sixty-four thousand, eight hundred sixteen".