13881665954 has 16 divisors (see below), whose sum is σ = 22442409528. Its totient is φ = 6401728512.

The previous prime is 13881665933. The next prime is 13881665999. The reversal of 13881665954 is 45956618831.

It can be written as a sum of positive squares in 4 ways, for example, as 12804054025 + 1077611929 = 113155^2 + 32827^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13881665954.

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, 183647 + ... + 247970.

Almost surely, 2^13881665954 is an apocalyptic number.

13881665954 is a deficient number, since it is larger than the sum of its proper divisors (8560743574).

13881665954 is a wasteful number, since it uses less digits than its factorization.

13881665954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432869.

The product of its digits is 6220800, while the sum is 56.

The spelling of 13881665954 in words is "thirteen billion, eight hundred eighty-one million, six hundred sixty-five thousand, nine hundred fifty-four".