18116956672 has 60 divisors (see below), whose sum is σ = 37121377986. Its totient is φ = 8828026880.

The previous prime is 18116956651. The next prime is 18116956691. The reversal of 18116956672 is 27665961181.

It can be written as a sum of positive squares in 3 ways, for example, as 1108623616 + 17008333056 = 33296^2 + 130416^2 .

Its product of digits (1088640) is a multiple of the sum of its prime divisors (972).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19501104 + ... + 19502032.

Almost surely, 2^18116956672 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 18116956672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18560688993).

18116956672 is an abundant number, since it is smaller than the sum of its proper divisors (19004421314).

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

18116956672 is an frugal number, since it uses more digits than its factorization.

18116956672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 972 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 52.

The spelling of 18116956672 in words is "eighteen billion, one hundred sixteen million, nine hundred fifty-six thousand, six hundred seventy-two".