13887681504 has 24 divisors (see below), whose sum is σ = 36455164200. Its totient is φ = 4629227136.

The previous prime is 13887681503. The next prime is 13887681517. The reversal of 13887681504 is 40518678831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887681503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72331579 + ... + 72331770.

It is an arithmetic number, because the mean of its divisors is an integer number (1518965175).

Almost surely, 2^13887681504 is an apocalyptic number.

It is an amenable number.

13887681504 is an abundant number, since it is smaller than the sum of its proper divisors (22567482696).

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

13887681504 is a wasteful number, since it uses less digits than its factorization.

13887681504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144663362 (or 144663354 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 13887681504 in words is "thirteen billion, eight hundred eighty-seven million, six hundred eighty-one thousand, five hundred four".