13205776155 has 32 divisors (see below), whose sum is σ = 24823169280. Its totient is φ = 5910276480.

The previous prime is 13205776147. The next prime is 13205776189. The reversal of 13205776155 is 55167750231.

It is not a de Polignac number, because 13205776155 - 2³ = 13205776147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3076125 + ... + 3080414.

It is an arithmetic number, because the mean of its divisors is an integer number (775724040).

Almost surely, 2^13205776155 is an apocalyptic number.

13205776155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13205776155 is a deficient number, since it is larger than the sum of its proper divisors (11617393125).

13205776155 is a wasteful number, since it uses less digits than its factorization.

13205776155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156571.

The product of its (nonzero) digits is 220500, while the sum is 42.

The spelling of 13205776155 in words is "thirteen billion, two hundred five million, seven hundred seventy-six thousand, one hundred fifty-five".