13115825887 has 4 divisors (see below), whose sum is σ = 13153407400. Its totient is φ = 13078244376.

The previous prime is 13115825857. The next prime is 13115825939. The reversal of 13115825887 is 78852851131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78852851131 = 9371 ⋅8414561.

It is a cyclic number.

It is not a de Polignac number, because 13115825887 - 2⁷ = 13115825759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13115825887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13115825857) 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, 18790233 + ... + 18790930.

It is an arithmetic number, because the mean of its divisors is an integer number (3288351850).

Almost surely, 2^13115825887 is an apocalyptic number.

13115825887 is a deficient number, since it is larger than the sum of its proper divisors (37581513).

13115825887 is an equidigital number, since it uses as much as digits as its factorization.

13115825887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37581512.

The product of its digits is 537600, while the sum is 49.

The spelling of 13115825887 in words is "thirteen billion, one hundred fifteen million, eight hundred twenty-five thousand, eight hundred eighty-seven".