16984891690 has 16 divisors (see below), whose sum is σ = 32924559528. Its totient is φ = 6271344576.

The previous prime is 16984891681. The next prime is 16984891727. The reversal of 16984891690 is 9619848961.

It can be written as a sum of positive squares in 4 ways, for example, as 10009802401 + 6975089289 = 100049^2 + 83517^2 .

It is a super-2 number, since 2×16984891690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65326377 + ... + 65326636.

Almost surely, 2^16984891690 is an apocalyptic number.

16984891690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16984891690 is a deficient number, since it is larger than the sum of its proper divisors (15939667838).

16984891690 is a wasteful number, since it uses less digits than its factorization.

16984891690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130653033.

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 16984891690 in words is "sixteen billion, nine hundred eighty-four million, eight hundred ninety-one thousand, six hundred ninety".