13117855608 has 256 divisors, whose sum is σ = 42940800000. Its totient is φ = 3658037760.

The previous prime is 13117855601. The next prime is 13117855633. The reversal of 13117855608 is 80655871131.

13117855608 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 7 + 85 + 560 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13117855601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18501558 + ... + 18502266.

It is an arithmetic number, because the mean of its divisors is an integer number (167737500).

Almost surely, 2^13117855608 is an apocalyptic number.

13117855608 is a gapful number since it is divisible by the number (18) 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 13117855608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21470400000).

13117855608 is an abundant number, since it is smaller than the sum of its proper divisors (29822944392).

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

13117855608 is a wasteful number, since it uses less digits than its factorization.

13117855608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 13117855608 in words is "thirteen billion, one hundred seventeen million, eight hundred fifty-five thousand, six hundred eight".