16694391168 has 512 divisors, whose sum is σ = 61324032000. Its totient is φ = 4353564672.

The previous prime is 16694391167. The next prime is 16694391239. The reversal of 16694391168 is 86119349661.

It is a happy number.

16694391168 is a `hidden beast` number, since 1 + 6 + 6 + 94 + 391 + 168 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16694391163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34279821 + ... + 34280307.

It is an arithmetic number, because the mean of its divisors is an integer number (119773500).

Almost surely, 2^16694391168 is an apocalyptic number.

16694391168 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 16694391168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30662016000).

16694391168 is an abundant number, since it is smaller than the sum of its proper divisors (44629640832).

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

16694391168 is a wasteful number, since it uses less digits than its factorization.

16694391168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 621 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The spelling of 16694391168 in words is "sixteen billion, six hundred ninety-four million, three hundred ninety-one thousand, one hundred sixty-eight".