13117954205 has 54 divisors (see below), whose sum is σ = 17615099418. Its totient is φ = 9375491840.

The previous prime is 13117954181. The next prime is 13117954231. The reversal of 13117954205 is 50245971131.

It can be written as a sum of positive squares in 3 ways, for example, as 4393833796 + 8724120409 = 66286^2 + 93403^2 .

It is not a de Polignac number, because 13117954205 - 2²⁰ = 13116905629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 100136990 + ... + 100137120.

Almost surely, 2^13117954205 is an apocalyptic number.

It is an amenable number.

13117954205 is a deficient number, since it is larger than the sum of its proper divisors (4497145213).

13117954205 is an equidigital number, since it uses as much as digits as its factorization.

13117954205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 13117954205 in words is "thirteen billion, one hundred seventeen million, nine hundred fifty-four thousand, two hundred five".