18005560617105 has 24 divisors (see below), whose sum is σ = 31219644942720. Its totient is φ = 9599886727200.

The previous prime is 18005560617059. The next prime is 18005560617127. The reversal of 18005560617105 is 50171606550081.

It is a happy number.

18005560617105 is a `hidden beast` number, since 1 + 80 + 0 + 5 + 560 + 6 + 1 + 7 + 1 + 0 + 5 = 666.

It is not a de Polignac number, because 18005560617105 - 2¹⁰ = 18005560616081 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64002571 + ... + 64283280.

It is an arithmetic number, because the mean of its divisors is an integer number (1300818539280).

Almost surely, 2^{18005560617105} is an apocalyptic number.

18005560617105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18005560617105 is a deficient number, since it is larger than the sum of its proper divisors (13214084325615).

18005560617105 is a wasteful number, since it uses less digits than its factorization.

18005560617105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128288981 (or 128288978 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The spelling of 18005560617105 in words is "eighteen trillion, five billion, five hundred sixty million, six hundred seventeen thousand, one hundred five".