13155500409 has 4 divisors (see below), whose sum is σ = 17540667216. Its totient is φ = 8770333604.

The previous prime is 13155500389. The next prime is 13155500419. The reversal of 13155500409 is 90400555131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13155500409 - 2⁸ = 13155500153 is a prime.

It is a super-2 number, since 2×13155500409² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13155500409.

It is not an unprimeable number, because it can be changed into a prime (13155500419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192583399 + ... + 2192583404.

It is an arithmetic number, because the mean of its divisors is an integer number (4385166804).

Almost surely, 2^13155500409 is an apocalyptic number.

It is an amenable number.

13155500409 is a deficient number, since it is larger than the sum of its proper divisors (4385166807).

13155500409 is an equidigital number, since it uses as much as digits as its factorization.

13155500409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385166806.

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 13155500409 in words is "thirteen billion, one hundred fifty-five million, five hundred thousand, four hundred nine".