13108891680 has 72 divisors (see below), whose sum is σ = 44734097772. Its totient is φ = 3495704064.

The previous prime is 13108891651. The next prime is 13108891693. The reversal of 13108891680 is 8619880131.

It can be written as a sum of positive squares in 2 ways, for example, as 12505501584 + 603390096 = 111828^2 + 24564^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4550259 + ... + 4553138.

Almost surely, 2^13108891680 is an apocalyptic number.

13108891680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13108891680 is an abundant number, since it is smaller than the sum of its proper divisors (31625206092).

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

13108891680 is a wasteful number, since it uses less digits than its factorization.

13108891680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9103418 (or 9103407 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 13108891680 in words is "thirteen billion, one hundred eight million, eight hundred ninety-one thousand, six hundred eighty".