13868236491 has 8 divisors (see below), whose sum is σ = 18493246464. Its totient is φ = 9244358760.

The previous prime is 13868236451. The next prime is 13868236513. The reversal of 13868236491 is 19463286831.

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

It is not a de Polignac number, because 13868236491 - 2²⁷ = 13734018763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13868236451) 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, 254055 + ... + 303776.

It is an arithmetic number, because the mean of its divisors is an integer number (2311655808).

Almost surely, 2^13868236491 is an apocalyptic number.

13868236491 is a deficient number, since it is larger than the sum of its proper divisors (4625009973).

13868236491 is an equidigital number, since it uses as much as digits as its factorization.

13868236491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566121.

The product of its digits is 1492992, while the sum is 51.

The spelling of 13868236491 in words is "thirteen billion, eight hundred sixty-eight million, two hundred thirty-six thousand, four hundred ninety-one".