16979218099 has 4 divisors (see below), whose sum is σ = 16980740080. Its totient is φ = 16977696120.

The previous prime is 16979218097. The next prime is 16979218127. The reversal of 16979218099 is 99081297961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99081297961 = 137 ⋅723221153.

It is a cyclic number.

It is not a de Polignac number, because 16979218099 - 2¹ = 16979218097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16979218097) 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, 744132 + ... + 766609.

It is an arithmetic number, because the mean of its divisors is an integer number (4245185020).

Almost surely, 2^16979218099 is an apocalyptic number.

16979218099 is a deficient number, since it is larger than the sum of its proper divisors (1521981).

16979218099 is a wasteful number, since it uses less digits than its factorization.

16979218099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521980.

The product of its (nonzero) digits is 4408992, while the sum is 61.

The spelling of 16979218099 in words is "sixteen billion, nine hundred seventy-nine million, two hundred eighteen thousand, ninety-nine".