16688491008 has 320 divisors, whose sum is σ = 53938452480. Its totient is φ = 4478976000.

The previous prime is 16688490943. The next prime is 16688491021. The reversal of 16688491008 is 80019488661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30847218 + ... + 30847758.

It is an arithmetic number, because the mean of its divisors is an integer number (168557664).

Almost surely, 2^16688491008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16688491008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26969226240).

16688491008 is an abundant number, since it is smaller than the sum of its proper divisors (37249961472).

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

16688491008 is a wasteful number, since it uses less digits than its factorization.

16688491008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 16688491008 in words is "sixteen billion, six hundred eighty-eight million, four hundred ninety-one thousand, eight".