16779117186 has 24 divisors (see below), whose sum is σ = 39151273980. Its totient is φ = 5162805216.

The previous prime is 16779117149. The next prime is 16779117197. The reversal of 16779117186 is 68171197761.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16778279961 + 837225 = 129531^2 + 915^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35852581 + ... + 35853048.

Almost surely, 2^16779117186 is an apocalyptic number.

16779117186 is an abundant number, since it is smaller than the sum of its proper divisors (22372156794).

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

16779117186 is a wasteful number, since it uses less digits than its factorization.

16779117186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71705650 (or 71705647 counting only the distinct ones).

The product of its digits is 889056, while the sum is 54.

The spelling of 16779117186 in words is "sixteen billion, seven hundred seventy-nine million, one hundred seventeen thousand, one hundred eighty-six".