16855899606 has 192 divisors, whose sum is σ = 46826777088. Its totient is φ = 4425228288.

The previous prime is 16855899583. The next prime is 16855899637. The reversal of 16855899606 is 60699855861.

16855899606 is a `hidden beast` number, since 16 + 8 + 5 + 5 + 8 + 9 + 9 + 606 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11365341 + ... + 11366823.

It is an arithmetic number, because the mean of its divisors is an integer number (243889464).

Almost surely, 2^16855899606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16855899606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23413388544).

16855899606 is an abundant number, since it is smaller than the sum of its proper divisors (29970877482).

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

16855899606 is a wasteful number, since it uses less digits than its factorization.

16855899606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 16855899606 in words is "sixteen billion, eight hundred fifty-five million, eight hundred ninety-nine thousand, six hundred six".