13111294640 has 20 divisors (see below), whose sum is σ = 30483760224. Its totient is φ = 5244517824.

The previous prime is 13111294639. The next prime is 13111294649. The reversal of 13111294640 is 4649211131.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 13111294597 and 13111294606.

It is not an unprimeable number, because it can be changed into a prime (13111294649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81945512 + ... + 81945671.

Almost surely, 2^13111294640 is an apocalyptic number.

13111294640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111294640 is an abundant number, since it is smaller than the sum of its proper divisors (17372465584).

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

13111294640 is a wasteful number, since it uses less digits than its factorization.

13111294640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163891196 (or 163891190 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 13111294640 in words is "thirteen billion, one hundred eleven million, two hundred ninety-four thousand, six hundred forty".