13549972768 has 24 divisors (see below), whose sum is σ = 26823904380. Its totient is φ = 6737552640.

The previous prime is 13549972747. The next prime is 13549972829. The reversal of 13549972768 is 86727994531.

It can be written as a sum of positive squares in 2 ways, for example, as 7591985424 + 5957987344 = 87132^2 + 77188^2 .

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, 1163923 + ... + 1175506.

Almost surely, 2^13549972768 is an apocalyptic number.

It is an amenable number.

13549972768 is a deficient number, since it is larger than the sum of its proper divisors (13273931612).

13549972768 is a wasteful number, since it uses less digits than its factorization.

13549972768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339620 (or 2339612 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 61.

The spelling of 13549972768 in words is "thirteen billion, five hundred forty-nine million, nine hundred seventy-two thousand, seven hundred sixty-eight".