13856388459 has 8 divisors (see below), whose sum is σ = 18475789632. Its totient is φ = 9237289800.

The previous prime is 13856388443. The next prime is 13856388473. The reversal of 13856388459 is 95488365831.

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

It is not a de Polignac number, because 13856388459 - 2⁴ = 13856388443 is a prime.

It is a super-2 number, since 2×13856388459² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13856388439) 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, 72952 + ... + 181754.

It is an arithmetic number, because the mean of its divisors is an integer number (2309473704).

Almost surely, 2^13856388459 is an apocalyptic number.

13856388459 is a deficient number, since it is larger than the sum of its proper divisors (4619401173).

13856388459 is a wasteful number, since it uses less digits than its factorization.

13856388459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151257.

The product of its digits is 24883200, while the sum is 60.

The spelling of 13856388459 in words is "thirteen billion, eight hundred fifty-six million, three hundred eighty-eight thousand, four hundred fifty-nine".