15997399369 has 32 divisors (see below), whose sum is σ = 19771799040. Its totient is φ = 12640320000.

The previous prime is 15997399357. The next prime is 15997399387. The reversal of 15997399369 is 96399379951.

15997399369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15997399369 - 2⁷ = 15997399241 is a prime.

It is a super-2 number, since 2×15997399369² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15997399298 and 15997399307.

It is not an unprimeable number, because it can be changed into a prime (15997399399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2803219 + ... + 2808919.

It is an arithmetic number, because the mean of its divisors is an integer number (617868720).

Almost surely, 2^15997399369 is an apocalyptic number.

It is an amenable number.

15997399369 is a deficient number, since it is larger than the sum of its proper divisors (3774399671).

15997399369 is a wasteful number, since it uses less digits than its factorization.

15997399369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6361.

The product of its digits is 111602610, while the sum is 70.

The spelling of 15997399369 in words is "fifteen billion, nine hundred ninety-seven million, three hundred ninety-nine thousand, three hundred sixty-nine".