120605105985 has 64 divisors (see below), whose sum is σ = 241392883200. Its totient is φ = 50058362880.

The previous prime is 120605105927. The next prime is 120605106029. The reversal of 120605105985 is 589501506021.

It is a happy number.

It is not a de Polignac number, because 120605105985 - 2⁷ = 120605105857 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 640960 + ... + 807489.

It is an arithmetic number, because the mean of its divisors is an integer number (3771763800).

Almost surely, 2^120605105985 is an apocalyptic number.

120605105985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120605105985 is an abundant number, since it is smaller than the sum of its proper divisors (120787777215).

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

120605105985 is a wasteful number, since it uses less digits than its factorization.

120605105985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448538.

The product of its (nonzero) digits is 108000, while the sum is 42.

The spelling of 120605105985 in words is "one hundred twenty billion, six hundred five million, one hundred five thousand, nine hundred eighty-five".