16890609798 has 24 divisors (see below), whose sum is σ = 37216600200. Its totient is φ = 5534775744.

The previous prime is 16890609767. The next prime is 16890609817. The reversal of 16890609798 is 89790609861.

16890609798 is a `hidden beast` number, since 16 + 8 + 9 + 0 + 609 + 7 + 9 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7951203 + ... + 7953326.

It is an arithmetic number, because the mean of its divisors is an integer number (1550691675).

Almost surely, 2^16890609798 is an apocalyptic number.

16890609798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16890609798 is an abundant number, since it is smaller than the sum of its proper divisors (20325990402).

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

16890609798 is a wasteful number, since it uses less digits than its factorization.

16890609798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15904596 (or 15904593 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

Adding to 16890609798 its sum of digits (63), we get a palindrome (16890609861).

The spelling of 16890609798 in words is "sixteen billion, eight hundred ninety million, six hundred nine thousand, seven hundred ninety-eight".