13885638261 has 24 divisors (see below), whose sum is σ = 20356903392. Its totient is φ = 8412808800.

The previous prime is 13885638257. The next prime is 13885638289. The reversal of 13885638261 is 16283658831.

It is a happy number.

It is not a de Polignac number, because 13885638261 - 2² = 13885638257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13885638461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2071926 + ... + 2078616.

It is an arithmetic number, because the mean of its divisors is an integer number (848204308).

Almost surely, 2^13885638261 is an apocalyptic number.

13885638261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13885638261 is a deficient number, since it is larger than the sum of its proper divisors (6471265131).

13885638261 is a wasteful number, since it uses less digits than its factorization.

13885638261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12433 (or 12422 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The spelling of 13885638261 in words is "thirteen billion, eight hundred eighty-five million, six hundred thirty-eight thousand, two hundred sixty-one".