13856985287 has 4 divisors (see below), whose sum is σ = 13881863736. Its totient is φ = 13832106840.

The previous prime is 13856985281. The next prime is 13856985299. The reversal of 13856985287 is 78258965831.

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 13856985287 - 2¹⁴ = 13856968903 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 (13856985281) 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, 12438389 + ... + 12439502.

It is an arithmetic number, because the mean of its divisors is an integer number (3470465934).

Almost surely, 2^13856985287 is an apocalyptic number.

13856985287 is a deficient number, since it is larger than the sum of its proper divisors (24878449).

13856985287 is an equidigital number, since it uses as much as digits as its factorization.

13856985287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24878448.

The product of its digits is 29030400, while the sum is 62.

The spelling of 13856985287 in words is "thirteen billion, eight hundred fifty-six million, nine hundred eighty-five thousand, two hundred eighty-seven".