618449918 has 8 divisors (see below), whose sum is σ = 943398360. Its totient is φ = 303983800.

The previous prime is 618449917. The next prime is 618449927. The reversal of 618449918 is 819944816.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618449917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620433 + ... + 2620668.

It is an arithmetic number, because the mean of its divisors is an integer number (117924795).

Almost surely, 2^618449918 is an apocalyptic number.

618449918 is a deficient number, since it is larger than the sum of its proper divisors (324948442).

618449918 is a wasteful number, since it uses less digits than its factorization.

618449918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241162.

The product of its digits is 497664, while the sum is 50.

The square root of 618449918 is about 24868.6533209983. The cubic root of 618449918 is about 851.9906827800.

The spelling of 618449918 in words is "six hundred eighteen million, four hundred forty-nine thousand, nine hundred eighteen".