13888765249 has 8 divisors (see below), whose sum is σ = 13933398528. Its totient is φ = 13844169600.

The previous prime is 13888765237. The next prime is 13888765273. The reversal of 13888765249 is 94256788831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13888765249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13888765229) 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, 854769 + ... + 870865.

It is an arithmetic number, because the mean of its divisors is an integer number (1741674816).

Almost surely, 2^13888765249 is an apocalyptic number.

It is an amenable number.

13888765249 is a deficient number, since it is larger than the sum of its proper divisors (44633279).

13888765249 is a wasteful number, since it uses less digits than its factorization.

13888765249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18815.

The product of its digits is 23224320, while the sum is 61.

The spelling of 13888765249 in words is "thirteen billion, eight hundred eighty-eight million, seven hundred sixty-five thousand, two hundred forty-nine".