16819997568 has 256 divisors, whose sum is σ = 49730630400. Its totient is φ = 4994662400.

The previous prime is 16819997549. The next prime is 16819997581. The reversal of 16819997568 is 86579991861.

It is a congruent number.

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, 62527738 + ... + 62528006.

It is an arithmetic number, because the mean of its divisors is an integer number (194260275).

Almost surely, 2^16819997568 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 16819997568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24865315200).

16819997568 is an abundant number, since it is smaller than the sum of its proper divisors (32910632832).

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

16819997568 is a wasteful number, since it uses less digits than its factorization.

16819997568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 529 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 69.

The spelling of 16819997568 in words is "sixteen billion, eight hundred nineteen million, nine hundred ninety-seven thousand, five hundred sixty-eight".