11556275165135 has 4 divisors (see below), whose sum is σ = 13867530198168. Its totient is φ = 9245020132104.

The previous prime is 11556275165111. The next prime is 11556275165137. The reversal of 11556275165135 is 53156157265511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11556275165135 - 2¹⁰ = 11556275164111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556275165137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155627516509 + ... + 1155627516518.

It is an arithmetic number, because the mean of its divisors is an integer number (3466882549542).

Almost surely, 2^{11556275165135} is an apocalyptic number.

11556275165135 is a deficient number, since it is larger than the sum of its proper divisors (2311255033033).

11556275165135 is an equidigital number, since it uses as much as digits as its factorization.

11556275165135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311255033032.

The product of its digits is 4725000, while the sum is 53.

The spelling of 11556275165135 in words is "eleven trillion, five hundred fifty-six billion, two hundred seventy-five million, one hundred sixty-five thousand, one hundred thirty-five".