13856368431 has 8 divisors (see below), whose sum is σ = 19447534720. Its totient is φ = 8751390552.

The previous prime is 13856368399. The next prime is 13856368433. The reversal of 13856368431 is 13486365831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13856368431 - 2⁵ = 13856368399 is a prime.

It is a super-2 number, since 2×13856368431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13856368433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121547035 + ... + 121547148.

It is an arithmetic number, because the mean of its divisors is an integer number (2430941840).

Almost surely, 2^13856368431 is an apocalyptic number.

13856368431 is a deficient number, since it is larger than the sum of its proper divisors (5591166289).

13856368431 is a wasteful number, since it uses less digits than its factorization.

13856368431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243094205.

The product of its digits is 1244160, while the sum is 48.

The spelling of 13856368431 in words is "thirteen billion, eight hundred fifty-six million, three hundred sixty-eight thousand, four hundred thirty-one".