18165540960 has 144 divisors (see below), whose sum is σ = 70845649056. Its totient is φ = 4152121344.

The previous prime is 18165540931. The next prime is 18165540973. The reversal of 18165540960 is 6904556181.

18165540960 is a `hidden beast` number, since 1 + 8 + 1 + 6 + 554 + 0 + 96 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 890989 + ... + 911148.

It is an arithmetic number, because the mean of its divisors is an integer number (491983674).

Almost surely, 2^18165540960 is an apocalyptic number.

18165540960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18165540960 is an abundant number, since it is smaller than the sum of its proper divisors (52680108096).

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

18165540960 is a wasteful number, since it uses less digits than its factorization.

18165540960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802165 (or 1802154 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 18165540960 in words is "eighteen billion, one hundred sixty-five million, five hundred forty thousand, nine hundred sixty".