16318979518578 has 32 divisors (see below), whose sum is σ = 35624577503232. Its totient is φ = 4942432630800.

The previous prime is 16318979518573. The next prime is 16318979518579. The reversal of 16318979518578 is 87581597981361.

It is not an unprimeable number, because it can be changed into a prime (16318979518571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67695718 + ... + 67936353.

It is an arithmetic number, because the mean of its divisors is an integer number (1113268046976).

Almost surely, 2^{16318979518578} is an apocalyptic number.

16318979518578 is an abundant number, since it is smaller than the sum of its proper divisors (19305597984654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16318979518578 is a wasteful number, since it uses less digits than its factorization.

16318979518578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135633910.

The product of its digits is 914457600, while the sum is 78.

The spelling of 16318979518578 in words is "sixteen trillion, three hundred eighteen billion, nine hundred seventy-nine million, five hundred eighteen thousand, five hundred seventy-eight".