13766981868 has 18 divisors (see below), whose sum is σ = 34799870924. Its totient is φ = 4588993944.

The previous prime is 13766981861. The next prime is 13766981909. The reversal of 13766981868 is 86818966731.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (13766981861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 191208046 + ... + 191208117.

Almost surely, 2^13766981868 is an apocalyptic number.

13766981868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13766981868 is an abundant number, since it is smaller than the sum of its proper divisors (21032889056).

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

13766981868 is a wasteful number, since it uses less digits than its factorization.

13766981868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382416173 (or 382416168 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 13766981868 in words is "thirteen billion, seven hundred sixty-six million, nine hundred eighty-one thousand, eight hundred sixty-eight".