15399014399 has 4 divisors (see below), whose sum is σ = 15651457320. Its totient is φ = 15146571480.

The previous prime is 15399014387. The next prime is 15399014401. The reversal of 15399014399 is 99341099351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15399014399 - 2¹⁶ = 15398948863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15399014399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15399014339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126221369 + ... + 126221490.

It is an arithmetic number, because the mean of its divisors is an integer number (3912864330).

Almost surely, 2^15399014399 is an apocalyptic number.

15399014399 is a deficient number, since it is larger than the sum of its proper divisors (252442921).

15399014399 is an equidigital number, since it uses as much as digits as its factorization.

15399014399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252442920.

The product of its (nonzero) digits is 1180980, while the sum is 53.

The spelling of 15399014399 in words is "fifteen billion, three hundred ninety-nine million, fourteen thousand, three hundred ninety-nine".