18144220560 has 80 divisors (see below), whose sum is σ = 56466135936. Its totient is φ = 4819615744.

The previous prime is 18144220559. The next prime is 18144220571. The reversal of 18144220560 is 6502244181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85404 + ... + 208763.

Almost surely, 2^18144220560 is an apocalyptic number.

18144220560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18144220560 is an abundant number, since it is smaller than the sum of its proper divisors (38321915376).

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

18144220560 is a wasteful number, since it uses less digits than its factorization.

18144220560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294440 (or 294434 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 18144220560 in words is "eighteen billion, one hundred forty-four million, two hundred twenty thousand, five hundred sixty".