13991137548 has 24 divisors (see below), whose sum is σ = 32865092400. Its totient is φ = 4632411840.

The previous prime is 13991137543. The next prime is 13991137549. The reversal of 13991137548 is 84573119931.

13991137548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13991137548.

It is not an unprimeable number, because it can be changed into a prime (13991137543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3910723 + ... + 3914298.

It is an arithmetic number, because the mean of its divisors is an integer number (1369378850).

Almost surely, 2^13991137548 is an apocalyptic number.

It is an amenable number.

13991137548 is an abundant number, since it is smaller than the sum of its proper divisors (18873954852).

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

13991137548 is a wasteful number, since it uses less digits than its factorization.

13991137548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825177 (or 7825175 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The spelling of 13991137548 in words is "thirteen billion, nine hundred ninety-one million, one hundred thirty-seven thousand, five hundred forty-eight".