13155205205 has 8 divisors (see below), whose sum is σ = 15868041432. Its totient is φ = 10469634048.

The previous prime is 13155205187. The next prime is 13155205213. The reversal of 13155205205 is 50250255131.

It can be written as a sum of positive squares in 4 ways, for example, as 1361462404 + 11793742801 = 36898^2 + 108599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13155205205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6815204 + ... + 6817133.

It is an arithmetic number, because the mean of its divisors is an integer number (1983505179).

Almost surely, 2^13155205205 is an apocalyptic number.

It is an amenable number.

13155205205 is a deficient number, since it is larger than the sum of its proper divisors (2712836227).

13155205205 is a wasteful number, since it uses less digits than its factorization.

13155205205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13632535.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 13155205205 in words is "thirteen billion, one hundred fifty-five million, two hundred five thousand, two hundred five".