18005050550555 has 8 divisors (see below), whose sum is σ = 21606131418000. Its totient is φ = 14403993268896.

The previous prime is 18005050550521. The next prime is 18005050550567. The reversal of 18005050550555 is 55505505050081.

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 18005050550555 - 2²² = 18005046356251 is a prime.

It is a super-2 number, since 2×18005050550555² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4171100 + ... + 7308089.

It is an arithmetic number, because the mean of its divisors is an integer number (2700766427250).

Almost surely, 2^{18005050550555} is an apocalyptic number.

18005050550555 is a deficient number, since it is larger than the sum of its proper divisors (3601080867445).

18005050550555 is a wasteful number, since it uses less digits than its factorization.

18005050550555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11792893.

The product of its (nonzero) digits is 625000, while the sum is 44.

The spelling of 18005050550555 in words is "eighteen trillion, five billion, fifty million, five hundred fifty thousand, five hundred fifty-five".