16399800986 has 8 divisors (see below), whose sum is σ = 25199694324. Its totient is φ = 7999902880.

The previous prime is 16399800979. The next prime is 16399801001. The reversal of 16399800986 is 68900899361.

It can be written as a sum of positive squares in 2 ways, for example, as 13256068225 + 3143732761 = 115135^2 + 56069^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99998705 + ... + 99998868.

Almost surely, 2^16399800986 is an apocalyptic number.

16399800986 is a deficient number, since it is larger than the sum of its proper divisors (8799893338).

16399800986 is a wasteful number, since it uses less digits than its factorization.

16399800986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199997616.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 16399800986 in words is "sixteen billion, three hundred ninety-nine million, eight hundred thousand, nine hundred eighty-six".