13885137887 has 4 divisors (see below), whose sum is σ = 13957835136. Its totient is φ = 13812440640.

The previous prime is 13885137839. The next prime is 13885137899. The reversal of 13885137887 is 78873158831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78873158831 = 71 ⋅1110889561.

It is a cyclic number.

It is not a de Polignac number, because 13885137887 - 2⁸ = 13885137631 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 (13885137817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36348338 + ... + 36348719.

It is an arithmetic number, because the mean of its divisors is an integer number (3489458784).

Almost surely, 2^13885137887 is an apocalyptic number.

13885137887 is a deficient number, since it is larger than the sum of its proper divisors (72697249).

13885137887 is an equidigital number, since it uses as much as digits as its factorization.

13885137887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72697248.

The product of its digits is 9031680, while the sum is 59.

The spelling of 13885137887 in words is "thirteen billion, eight hundred eighty-five million, one hundred thirty-seven thousand, eight hundred eighty-seven".