13906991178 has 48 divisors (see below), whose sum is σ = 30390456096. Its totient is φ = 4595940960.

The previous prime is 13906991173. The next prime is 13906991207. The reversal of 13906991178 is 87119960931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13906991173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3362800 + ... + 3366932.

It is an arithmetic number, because the mean of its divisors is an integer number (633134502).

Almost surely, 2^13906991178 is an apocalyptic number.

13906991178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13906991178 is an abundant number, since it is smaller than the sum of its proper divisors (16483464918).

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

13906991178 is a wasteful number, since it uses less digits than its factorization.

13906991178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699 (or 5696 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The spelling of 13906991178 in words is "thirteen billion, nine hundred six million, nine hundred ninety-one thousand, one hundred seventy-eight".