18159290112 has 144 divisors (see below), whose sum is σ = 52825070592. Its totient is φ = 5513134080.

The previous prime is 18159290101. The next prime is 18159290117. The reversal of 18159290112 is 21109295181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18159290117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382303 + ... + 427169.

It is an arithmetic number, because the mean of its divisors is an integer number (366840768).

Almost surely, 2^18159290112 is an apocalyptic number.

18159290112 is a gapful number since it is divisible by the number (12) 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 18159290112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26412535296).

18159290112 is an abundant number, since it is smaller than the sum of its proper divisors (34665780480).

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

18159290112 is a wasteful number, since it uses less digits than its factorization.

18159290112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44934 (or 44920 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 39.

The spelling of 18159290112 in words is "eighteen billion, one hundred fifty-nine million, two hundred ninety thousand, one hundred twelve".