13180136436 has 18 divisors (see below), whose sum is σ = 33316456082. Its totient is φ = 4393378800.

The previous prime is 13180136423. The next prime is 13180136461. The reversal of 13180136436 is 63463108131.

13180136436 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 0 + 1 + 3 + 643 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12994632036 + 185504400 = 113994^2 + 13620^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 366114901 = 13180136436 / (1 + 3 + 1 + 8 + 0 + 1 + 3 + 6 + 4 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 13180136436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183057415 + ... + 183057486.

Almost surely, 2^13180136436 is an apocalyptic number.

It is an amenable number.

13180136436 is an abundant number, since it is smaller than the sum of its proper divisors (20136319646).

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

13180136436 is a wasteful number, since it uses less digits than its factorization.

13180136436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366114911 (or 366114906 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 13180136436 in words is "thirteen billion, one hundred eighty million, one hundred thirty-six thousand, four hundred thirty-six".