16194551808 has 120 divisors (see below), whose sum is σ = 45459625120. Its totient is φ = 5113774080.

The previous prime is 16194551801. The next prime is 16194551839. The reversal of 16194551808 is 80815549161.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16194551801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925218 + ... + 942558.

Almost surely, 2^16194551808 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 16194551808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22729812560).

16194551808 is an abundant number, since it is smaller than the sum of its proper divisors (29265073312).

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

16194551808 is an equidigital number, since it uses as much as digits as its factorization.

16194551808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17391 (or 17365 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 48.

The spelling of 16194551808 in words is "sixteen billion, one hundred ninety-four million, five hundred fifty-one thousand, eight hundred eight".