618194985 has 16 divisors (see below), whose sum is σ = 991815936. Its totient is φ = 328802688.

The previous prime is 618194981. The next prime is 618195013. The reversal of 618194985 is 589491816.

It is not a de Polignac number, because 618194985 - 2² = 618194981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (618194981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50644 + ... + 61653.

It is an arithmetic number, because the mean of its divisors is an integer number (61988496).

Almost surely, 2^618194985 is an apocalyptic number.

It is an amenable number.

618194985 is a deficient number, since it is larger than the sum of its proper divisors (373620951).

618194985 is a wasteful number, since it uses less digits than its factorization.

618194985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112672.

The product of its digits is 622080, while the sum is 51.

The square root of 618194985 is about 24863.5272035164. The cubic root of 618194985 is about 851.8735995231.

The spelling of 618194985 in words is "six hundred eighteen million, one hundred ninety-four thousand, nine hundred eighty-five".