18169267648 has 112 divisors (see below), whose sum is σ = 42697099264. Its totient is φ = 7506846720.

The previous prime is 18169267631. The next prime is 18169267673. The reversal of 18169267648 is 84676296181.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 18169267592 and 18169267601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3844615 + ... + 3849337.

Almost surely, 2^18169267648 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 18169267648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21348549632).

18169267648 is an abundant number, since it is smaller than the sum of its proper divisors (24527831616).

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

18169267648 is a wasteful number, since it uses less digits than its factorization.

18169267648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050 (or 5040 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The spelling of 18169267648 in words is "eighteen billion, one hundred sixty-nine million, two hundred sixty-seven thousand, six hundred forty-eight".