16991243592 has 64 divisors (see below), whose sum is σ = 44139048960. Its totient is φ = 5444712000.

The previous prime is 16991243569. The next prime is 16991243593. The reversal of 16991243592 is 29534219961.

16991243592 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16991243593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36723 + ... + 187965.

It is an arithmetic number, because the mean of its divisors is an integer number (689672640).

Almost surely, 2^16991243592 is an apocalyptic number.

16991243592 is a gapful number since it is divisible by the number (12) 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 16991243592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22069524480).

16991243592 is an abundant number, since it is smaller than the sum of its proper divisors (27147805368).

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

16991243592 is a wasteful number, since it uses less digits than its factorization.

16991243592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151434 (or 151430 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 51.

The spelling of 16991243592 in words is "sixteen billion, nine hundred ninety-one million, two hundred forty-three thousand, five hundred ninety-two".