18000128660 has 48 divisors (see below), whose sum is σ = 38408997312. Its totient is φ = 7084800000.

The previous prime is 18000128651. The next prime is 18000128677. The reversal of 18000128660 is 6682100081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395060 + ... + 438260.

It is an arithmetic number, because the mean of its divisors is an integer number (800187444).

Almost surely, 2^18000128660 is an apocalyptic number.

18000128660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18000128660 is an abundant number, since it is smaller than the sum of its proper divisors (20408868652).

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

18000128660 is a wasteful number, since it uses less digits than its factorization.

18000128660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43544 (or 43542 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 18000128660 in words is "eighteen billion, one hundred twenty-eight thousand, six hundred sixty".