18120775655 has 8 divisors (see below), whose sum is σ = 21835915200. Its totient is φ = 14435964256.

The previous prime is 18120775649. The next prime is 18120775679. The reversal of 18120775655 is 55657702181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18120775655 - 2¹⁴ = 18120759271 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 7580720 + ... + 7583109.

It is an arithmetic number, because the mean of its divisors is an integer number (2729489400).

Almost surely, 2^18120775655 is an apocalyptic number.

18120775655 is a deficient number, since it is larger than the sum of its proper divisors (3715139545).

18120775655 is a wasteful number, since it uses less digits than its factorization.

18120775655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15164073.

The product of its (nonzero) digits is 588000, while the sum is 47.

The spelling of 18120775655 in words is "eighteen billion, one hundred twenty million, seven hundred seventy-five thousand, six hundred fifty-five".