15818997873 has 16 divisors (see below), whose sum is σ = 24435349376. Its totient is φ = 8915598720.

The previous prime is 15818997863. The next prime is 15818997911. The reversal of 15818997873 is 37879981851.

15818997873 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 15818997873 - 2¹⁰ = 15818996849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15818997863) 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 15 ways as a sum of consecutive naturals, for example, 5157958 + ... + 5161023.

It is an arithmetic number, because the mean of its divisors is an integer number (1527209336).

Almost surely, 2^15818997873 is an apocalyptic number.

It is an amenable number.

15818997873 is a deficient number, since it is larger than the sum of its proper divisors (8616351503).

15818997873 is a wasteful number, since it uses less digits than its factorization.

15818997873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319064.

The product of its digits is 30481920, while the sum is 66.

The spelling of 15818997873 in words is "fifteen billion, eight hundred eighteen million, nine hundred ninety-seven thousand, eight hundred seventy-three".