13809909775 has 12 divisors (see below), whose sum is σ = 17127524304. Its totient is φ = 11045840000.

The previous prime is 13809909731. The next prime is 13809909779. The reversal of 13809909775 is 57790990831.

It is a happy number.

It is not a de Polignac number, because 13809909775 - 2¹³ = 13809901583 is a prime.

It is a super-3 number, since 3×13809909775³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809909779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90375 + ... + 189175.

It is an arithmetic number, because the mean of its divisors is an integer number (1427293692).

Almost surely, 2^13809909775 is an apocalyptic number.

13809909775 is a deficient number, since it is larger than the sum of its proper divisors (3317614529).

13809909775 is an equidigital number, since it uses as much as digits as its factorization.

13809909775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104402 (or 104397 counting only the distinct ones).

The product of its (nonzero) digits is 4286520, while the sum is 58.

The spelling of 13809909775 in words is "thirteen billion, eight hundred nine million, nine hundred nine thousand, seven hundred seventy-five".