16500091968 has 168 divisors, whose sum is σ = 47937643520. Its totient is φ = 5425781760.

The previous prime is 16500091919. The next prime is 16500091973. The reversal of 16500091968 is 86919000561.

It is a super-2 number, since 2×16500091968² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15434538 + ... + 15435606.

Almost surely, 2^16500091968 is an apocalyptic number.

16500091968 is a gapful number since it is divisible by the number (18) 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 16500091968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23968821760).

16500091968 is an abundant number, since it is smaller than the sum of its proper divisors (31437551552).

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

16500091968 is a wasteful number, since it uses less digits than its factorization.

16500091968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 16500091968 in words is "sixteen billion, five hundred million, ninety-one thousand, nine hundred sixty-eight".