18018159264 has 288 divisors, whose sum is σ = 63109670400. Its totient is φ = 4981616640.

The previous prime is 18018159239. The next prime is 18018159283. The reversal of 18018159264 is 46295181081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1305552 + ... + 1319280.

It is an arithmetic number, because the mean of its divisors is an integer number (219130800).

Almost surely, 2^18018159264 is an apocalyptic number.

18018159264 is a gapful number since it is divisible by the number (14) 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 18018159264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31554835200).

18018159264 is an abundant number, since it is smaller than the sum of its proper divisors (45091511136).

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

18018159264 is a wasteful number, since it uses less digits than its factorization.

18018159264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13793 (or 13772 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 18018159264 in words is "eighteen billion, eighteen million, one hundred fifty-nine thousand, two hundred sixty-four".