13616991136 has 96 divisors (see below), whose sum is σ = 32355711360. Its totient is φ = 5510716416.

The previous prime is 13616991131. The next prime is 13616991163. The reversal of 13616991136 is 63119961631.

It is not an unprimeable number, because it can be changed into a prime (13616991131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344106 + ... + 1354198.

It is an arithmetic number, because the mean of its divisors is an integer number (337038660).

Almost surely, 2^13616991136 is an apocalyptic number.

13616991136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13616991136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16177855680).

13616991136 is an abundant number, since it is smaller than the sum of its proper divisors (18738720224).

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

13616991136 is a wasteful number, since it uses less digits than its factorization.

13616991136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10446 (or 10438 counting only the distinct ones).

The product of its digits is 157464, while the sum is 46.

The spelling of 13616991136 in words is "thirteen billion, six hundred sixteen million, nine hundred ninety-one thousand, one hundred thirty-six".