16857327979 has 8 divisors (see below), whose sum is σ = 17204786720. Its totient is φ = 16512163200.

The previous prime is 16857327943. The next prime is 16857328001. The reversal of 16857327979 is 97972375861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16857327979 - 2¹⁵ = 16857295211 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 16857327979.

It is not an unprimeable number, because it can be changed into a prime (16857327679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558639 + ... + 588040.

It is an arithmetic number, because the mean of its divisors is an integer number (2150598340).

Almost surely, 2^16857327979 is an apocalyptic number.

16857327979 is a deficient number, since it is larger than the sum of its proper divisors (347458741).

16857327979 is a wasteful number, since it uses less digits than its factorization.

16857327979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146981.

The product of its digits is 40007520, while the sum is 64.

The spelling of 16857327979 in words is "sixteen billion, eight hundred fifty-seven million, three hundred twenty-seven thousand, nine hundred seventy-nine".