13136721606 has 12 divisors (see below), whose sum is σ = 28462896852. Its totient is φ = 4378907196.

The previous prime is 13136721601. The next prime is 13136721667. The reversal of 13136721606 is 60612763131.

13136721606 is a `hidden beast` number, since 13 + 1 + 36 + 7 + 2 + 1 + 606 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13136721601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364908916 + ... + 364908951.

It is an arithmetic number, because the mean of its divisors is an integer number (2371908071).

Almost surely, 2^13136721606 is an apocalyptic number.

13136721606 is an abundant number, since it is smaller than the sum of its proper divisors (15326175246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13136721606 is a wasteful number, since it uses less digits than its factorization.

13136721606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729817875 (or 729817872 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 13136721606 in words is "thirteen billion, one hundred thirty-six million, seven hundred twenty-one thousand, six hundred six".