16819698638 has 8 divisors (see below), whose sum is σ = 25302256632. Its totient is φ = 8385613096.

The previous prime is 16819698563. The next prime is 16819698641. The reversal of 16819698638 is 83689691861.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12117245 + ... + 12118632.

It is an arithmetic number, because the mean of its divisors is an integer number (3162782079).

Almost surely, 2^16819698638 is an apocalyptic number.

16819698638 is a deficient number, since it is larger than the sum of its proper divisors (8482557994).

16819698638 is a wasteful number, since it uses less digits than its factorization.

16819698638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24236226.

The product of its digits is 26873856, while the sum is 65.

The spelling of 16819698638 in words is "sixteen billion, eight hundred nineteen million, six hundred ninety-eight thousand, six hundred thirty-eight".