13109563008 has 96 divisors (see below), whose sum is σ = 37751153700. Its totient is φ = 4366725120.

The previous prime is 13109563003. The next prime is 13109563063. The reversal of 13109563008 is 80036590131.

It is a happy number.

13109563008 is a `hidden beast` number, since 1 + 3 + 10 + 9 + 5 + 630 + 0 + 8 = 666.

It is a Cunningham number, because it is equal to 114497²-1.

It can be written as a sum of positive squares in 2 ways, for example, as 12848675904 + 260887104 = 113352^2 + 16152^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (13109563001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2057748 + ... + 2064108.

Almost surely, 2^13109563008 is an apocalyptic number.

13109563008 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 13109563008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18875576850).

13109563008 is an abundant number, since it is smaller than the sum of its proper divisors (24641590692).

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

13109563008 is a wasteful number, since it uses less digits than its factorization.

13109563008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170 (or 8155 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 13109563008 in words is "thirteen billion, one hundred nine million, five hundred sixty-three thousand, eight".