18161281160 has 128 divisors (see below), whose sum is σ = 46632360960. Its totient is φ = 6301152000.

The previous prime is 18161281141. The next prime is 18161281223. The reversal of 18161281160 is 6118216181.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18161281160.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4481135 + ... + 4485185.

It is an arithmetic number, because the mean of its divisors is an integer number (364315320).

Almost surely, 2^18161281160 is an apocalyptic number.

18161281160 is a gapful number since it is divisible by the number (10) 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 18161281160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23316180480).

18161281160 is an abundant number, since it is smaller than the sum of its proper divisors (28471079800).

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

18161281160 is a wasteful number, since it uses less digits than its factorization.

18161281160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539 (or 4535 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The spelling of 18161281160 in words is "eighteen billion, one hundred sixty-one million, two hundred eighty-one thousand, one hundred sixty".