13813775409 has 32 divisors (see below), whose sum is σ = 22179189760. Its totient is φ = 7470792000.

The previous prime is 13813775399. The next prime is 13813775419. The reversal of 13813775409 is 90457731831.

It is an interprime number because it is at equal distance from previous prime (13813775399) and next prime (13813775419).

It is not a de Polignac number, because 13813775409 - 2⁷ = 13813775281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13813775419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402879 + ... + 435819.

It is an arithmetic number, because the mean of its divisors is an integer number (693099680).

Almost surely, 2^13813775409 is an apocalyptic number.

13813775409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13813775409 is a deficient number, since it is larger than the sum of its proper divisors (8365414351).

13813775409 is a wasteful number, since it uses less digits than its factorization.

13813775409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34021.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 13813775409 in words is "thirteen billion, eight hundred thirteen million, seven hundred seventy-five thousand, four hundred nine".