16985697280 has 88 divisors (see below), whose sum is σ = 40863687840. Its totient is φ = 6774620160.

The previous prime is 16985697269. The next prime is 16985697299. The reversal of 16985697280 is 8279658961.

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, 1833460 + ... + 1842700.

Almost surely, 2^16985697280 is an apocalyptic number.

16985697280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16985697280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20431843920).

16985697280 is an abundant number, since it is smaller than the sum of its proper divisors (23877990560).

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

16985697280 is an equidigital number, since it uses as much as digits as its factorization.

16985697280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625 (or 9607 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 16985697280 in words is "sixteen billion, nine hundred eighty-five million, six hundred ninety-seven thousand, two hundred eighty".