13155510520523 has 16 divisors (see below), whose sum is σ = 15043644907200. Its totient is φ = 11269570909056.

The previous prime is 13155510520517. The next prime is 13155510520543. The reversal of 13155510520523 is 32502501555131.

It is a cyclic number.

It is not a de Polignac number, because 13155510520523 - 2¹² = 13155510516427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13155510520513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274432265 + ... + 274480197.

It is an arithmetic number, because the mean of its divisors is an integer number (940227806700).

Almost surely, 2^{13155510520523} is an apocalyptic number.

13155510520523 is a deficient number, since it is larger than the sum of its proper divisors (1888134386677).

13155510520523 is a wasteful number, since it uses less digits than its factorization.

13155510520523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70006.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 13155510520523 in words is "thirteen trillion, one hundred fifty-five billion, five hundred ten million, five hundred twenty thousand, five hundred twenty-three".