16638177068 has 12 divisors (see below), whose sum is σ = 29133720840. Its totient is φ = 8314256832.

The previous prime is 16638177037. The next prime is 16638177079. The reversal of 16638177068 is 86077183661.

It is a super-2 number, since 2×16638177068² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200173 + ... + 1213956.

It is an arithmetic number, because the mean of its divisors is an integer number (2427810070).

Almost surely, 2^16638177068 is an apocalyptic number.

It is an amenable number.

16638177068 is a deficient number, since it is larger than the sum of its proper divisors (12495543772).

16638177068 is a wasteful number, since it uses less digits than its factorization.

16638177068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415856 (or 2415854 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 16638177068 in words is "sixteen billion, six hundred thirty-eight million, one hundred seventy-seven thousand, sixty-eight".