13977131904 has 160 divisors (see below), whose sum is σ = 41717194200. Its totient is φ = 4645444608.

The previous prime is 13977131887. The next prime is 13977131921. The reversal of 13977131904 is 40913177931.

13977131904 is a `hidden beast` number, since 1 + 397 + 71 + 3 + 190 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (13977131887) and next prime (13977131921).

It is a self number, because there is not a number n which added to its sum of digits gives 13977131904.

It is a congruent number.

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, 3927694 + ... + 3931250.

Almost surely, 2^13977131904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13977131904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20858597100).

13977131904 is an abundant number, since it is smaller than the sum of its proper divisors (27740062296).

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

13977131904 is an equidigital number, since it uses as much as digits as its factorization.

13977131904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The spelling of 13977131904 in words is "thirteen billion, nine hundred seventy-seven million, one hundred thirty-one thousand, nine hundred four".