13187691136 has 32 divisors (see below), whose sum is σ = 26382340800. Its totient is φ = 6566241024.

The previous prime is 13187691091. The next prime is 13187691149. The reversal of 13187691136 is 63119678131.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184950 + ... + 246133.

It is an arithmetic number, because the mean of its divisors is an integer number (824448150).

Almost surely, 2^13187691136 is an apocalyptic number.

13187691136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13187691136 is an abundant number, since it is smaller than the sum of its proper divisors (13194649664).

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

13187691136 is an equidigital number, since it uses as much as digits as its factorization.

13187691136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431336 (or 431324 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The spelling of 13187691136 in words is "thirteen billion, one hundred eighty-seven million, six hundred ninety-one thousand, one hundred thirty-six".