13920816599 has 4 divisors (see below), whose sum is σ = 13922005464. Its totient is φ = 13919627736.

The previous prime is 13920816509. The next prime is 13920816607. The reversal of 13920816599 is 99561802931.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13920816599 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 13920816599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920816509) 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, 576692 + ... + 600345.

It is an arithmetic number, because the mean of its divisors is an integer number (3480501366).

Almost surely, 2^13920816599 is an apocalyptic number.

13920816599 is a deficient number, since it is larger than the sum of its proper divisors (1188865).

13920816599 is a wasteful number, since it uses less digits than its factorization.

13920816599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188864.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 13920816599 in words is "thirteen billion, nine hundred twenty million, eight hundred sixteen thousand, five hundred ninety-nine".