13809081705 has 16 divisors (see below), whose sum is σ = 22608358080. Its totient is φ = 7193567808.

The previous prime is 13809081697. The next prime is 13809081709. The reversal of 13809081705 is 50718090831.

It is not a de Polignac number, because 13809081705 - 2³ = 13809081697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13809081709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10704070 + ... + 10705359.

It is an arithmetic number, because the mean of its divisors is an integer number (1413022380).

Almost surely, 2^13809081705 is an apocalyptic number.

13809081705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13809081705 is a deficient number, since it is larger than the sum of its proper divisors (8799276375).

13809081705 is a wasteful number, since it uses less digits than its factorization.

13809081705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21409480.

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 13809081705 in words is "thirteen billion, eight hundred nine million, eighty-one thousand, seven hundred five".