16867318117 has 4 divisors (see below), whose sum is σ = 18164804140. Its totient is φ = 15569832096.

The previous prime is 16867318081. The next prime is 16867318121. The reversal of 16867318117 is 71181376861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71181376861 = 7 ⋅10168768123.

It can be written as a sum of positive squares in 2 ways, for example, as 3908000196 + 12959317921 = 62514^2 + 113839^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16867318117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16867318187) 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, 648742992 + ... + 648743017.

It is an arithmetic number, because the mean of its divisors is an integer number (4541201035).

Almost surely, 2^16867318117 is an apocalyptic number.

It is an amenable number.

16867318117 is a deficient number, since it is larger than the sum of its proper divisors (1297486023).

16867318117 is a wasteful number, since it uses less digits than its factorization.

16867318117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297486022.

The product of its digits is 338688, while the sum is 49.

The spelling of 16867318117 in words is "sixteen billion, eight hundred sixty-seven million, three hundred eighteen thousand, one hundred seventeen".