13809163905 has 48 divisors (see below), whose sum is σ = 25101498240. Its totient is φ = 7282078848.

The previous prime is 13809163891. The next prime is 13809163909. The reversal of 13809163905 is 50936190831.

13809163905 is a `hidden beast` number, since 1 + 3 + 8 + 0 + 9 + 1 + 639 + 0 + 5 = 666.

13809163905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13809163905 - 2⁴ = 13809163889 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (13809163909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44284 + ... + 171986.

It is an arithmetic number, because the mean of its divisors is an integer number (522947880).

Almost surely, 2^13809163905 is an apocalyptic number.

13809163905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13809163905 is a deficient number, since it is larger than the sum of its proper divisors (11292334335).

13809163905 is an equidigital number, since it uses as much as digits as its factorization.

13809163905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127812 (or 127800 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 13809163905 in words is "thirteen billion, eight hundred nine million, one hundred sixty-three thousand, nine hundred five".