16636396408 has 16 divisors (see below), whose sum is σ = 31658815080. Its totient is φ = 8194045728.

The previous prime is 16636396397. The next prime is 16636396421. The reversal of 16636396408 is 80469363661.

It is a congruent number.

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, 15518491 + ... + 15519562.

Almost surely, 2^16636396408 is an apocalyptic number.

It is an amenable number.

16636396408 is a deficient number, since it is larger than the sum of its proper divisors (15022418672).

16636396408 is a wasteful number, since it uses less digits than its factorization.

16636396408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31038126 (or 31038122 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 52.

The spelling of 16636396408 in words is "sixteen billion, six hundred thirty-six million, three hundred ninety-six thousand, four hundred eight".