13878249959 has 6 divisors (see below), whose sum is σ = 16144086744. Its totient is φ = 11895642780.

The previous prime is 13878249943. The next prime is 13878249991. The reversal of 13878249959 is 95994287831.

It is not a de Polignac number, because 13878249959 - 2⁴ = 13878249943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13878249895 and 13878249904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878249929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141614747 + ... + 141614844.

It is an arithmetic number, because the mean of its divisors is an integer number (2690681124).

Almost surely, 2^13878249959 is an apocalyptic number.

13878249959 is a deficient number, since it is larger than the sum of its proper divisors (2265836785).

13878249959 is an equidigital number, since it uses as much as digits as its factorization.

13878249959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283229605 (or 283229598 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 65.

The spelling of 13878249959 in words is "thirteen billion, eight hundred seventy-eight million, two hundred forty-nine thousand, nine hundred fifty-nine".