13278806205 has 24 divisors (see below), whose sum is σ = 24714840672. Its totient is φ = 6070311072.

The previous prime is 13278806171. The next prime is 13278806209. The reversal of 13278806205 is 50260887231.

It is not a de Polignac number, because 13278806205 - 2¹⁵ = 13278773437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278806209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9032467 + ... + 9033936.

It is an arithmetic number, because the mean of its divisors is an integer number (1029785028).

Almost surely, 2^13278806205 is an apocalyptic number.

13278806205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13278806205 is a deficient number, since it is larger than the sum of its proper divisors (11436034467).

13278806205 is a wasteful number, since it uses less digits than its factorization.

13278806205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18066425 (or 18066418 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 13278806205 in words is "thirteen billion, two hundred seventy-eight million, eight hundred six thousand, two hundred five".