16991145732 has 144 divisors (see below), whose sum is σ = 46941466880. Its totient is φ = 4764070080.

The previous prime is 16991145719. The next prime is 16991145767. The reversal of 16991145732 is 23754119961.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1179123 + ... + 1193445.

Almost surely, 2^16991145732 is an apocalyptic number.

16991145732 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 16991145732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23470733440).

16991145732 is an abundant number, since it is smaller than the sum of its proper divisors (29950321148).

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

16991145732 is a wasteful number, since it uses less digits than its factorization.

16991145732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14414 (or 14401 counting only the distinct ones).

The product of its digits is 408240, while the sum is 48.

The spelling of 16991145732 in words is "sixteen billion, nine hundred ninety-one million, one hundred forty-five thousand, seven hundred thirty-two".