13809715840 has 128 divisors (see below), whose sum is σ = 33756549120. Its totient is φ = 5400944640.

The previous prime is 13809715837. The next prime is 13809715873. The reversal of 13809715840 is 4851790831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5769684 + ... + 5772076.

It is an arithmetic number, because the mean of its divisors is an integer number (263723040).

Almost surely, 2^13809715840 is an apocalyptic number.

13809715840 is a gapful number since it is divisible by the number (10) 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 13809715840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16878274560).

13809715840 is an abundant number, since it is smaller than the sum of its proper divisors (19946833280).

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

13809715840 is a wasteful number, since it uses less digits than its factorization.

13809715840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610 (or 2598 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 13809715840 in words is "thirteen billion, eight hundred nine million, seven hundred fifteen thousand, eight hundred forty".