13040835156 has 18 divisors (see below), whose sum is σ = 32964333402. Its totient is φ = 4346945040.

The previous prime is 13040835139. The next prime is 13040835169. The reversal of 13040835156 is 65153804031.

13040835156 is a `hidden beast` number, since 130 + 4 + 0 + 8 + 3 + 515 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12269106756 + 771728400 = 110766^2 + 27780^2 .

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

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: 362245421 = 13040835156 / (1 + 3 + 0 + 4 + 0 + 8 + 3 + 5 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 13040835156.

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, 181122675 + ... + 181122746.

Almost surely, 2^13040835156 is an apocalyptic number.

It is an amenable number.

13040835156 is an abundant number, since it is smaller than the sum of its proper divisors (19923498246).

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

13040835156 is a wasteful number, since it uses less digits than its factorization.

13040835156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362245431 (or 362245426 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 13040835156 in words is "thirteen billion, forty million, eight hundred thirty-five thousand, one hundred fifty-six".