18162551472 has 160 divisors (see below), whose sum is σ = 51296716800. Its totient is φ = 5504249856.

The previous prime is 18162551471. The next prime is 18162551507. The reversal of 18162551472 is 27415526181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18162551471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12620929 + ... + 12622367.

It is an arithmetic number, because the mean of its divisors is an integer number (320604480).

Almost surely, 2^18162551472 is an apocalyptic number.

18162551472 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 18162551472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25648358400).

18162551472 is an abundant number, since it is smaller than the sum of its proper divisors (33134165328).

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

18162551472 is a wasteful number, since it uses less digits than its factorization.

18162551472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1749 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The spelling of 18162551472 in words is "eighteen billion, one hundred sixty-two million, five hundred fifty-one thousand, four hundred seventy-two".