618221085 has 8 divisors (see below), whose sum is σ = 989153760. Its totient is φ = 329717904.

The previous prime is 618221081. The next prime is 618221137. The reversal of 618221085 is 580122816.

618221085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 618221085 - 2² = 618221081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618221081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20607355 + ... + 20607384.

It is an arithmetic number, because the mean of its divisors is an integer number (123644220).

Almost surely, 2^618221085 is an apocalyptic number.

It is an amenable number.

618221085 is a deficient number, since it is larger than the sum of its proper divisors (370932675).

618221085 is a wasteful number, since it uses less digits than its factorization.

618221085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41214747.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 618221085 is about 24864.0520631694. The cubic root of 618221085 is about 851.8855879672.

The spelling of 618221085 in words is "six hundred eighteen million, two hundred twenty-one thousand, eighty-five".