16991100000 has 1152 divisors, whose sum is σ = 75595161600. Its totient is φ = 3628800000.

The previous prime is 16991099977. The next prime is 16991100001. The reversal of 16991100000 is 119961.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991100001) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 548099985 + ... + 548100015.

It is an arithmetic number, because the mean of its divisors is an integer number (65620800).

Almost surely, 2^16991100000 is an apocalyptic number.

16991100000 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 16991100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37797580800).

16991100000 is an abundant number, since it is smaller than the sum of its proper divisors (58604061600).

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

16991100000 is an equidigital number, since it uses as much as digits as its factorization.

16991100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

Adding to 16991100000 its reverse (119961), we get a palindrome (16991219961).

The spelling of 16991100000 in words is "sixteen billion, nine hundred ninety-one million, one hundred thousand".