16991880084 has 48 divisors (see below), whose sum is σ = 45474096640. Its totient is φ = 5481250560.

The previous prime is 16991880077. The next prime is 16991880091. The reversal of 16991880084 is 48008819961.

It is an interprime number because it is at equal distance from previous prime (16991880077) and next prime (16991880091).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 16991880084.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2534269 + ... + 2540964.

Almost surely, 2^16991880084 is an apocalyptic number.

It is an amenable number.

16991880084 is an abundant number, since it is smaller than the sum of its proper divisors (28482216556).

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

16991880084 is a wasteful number, since it uses less digits than its factorization.

16991880084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075277 (or 5075269 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 16991880084 in words is "sixteen billion, nine hundred ninety-one million, eight hundred eighty thousand, eighty-four".