818228761 has 8 divisors (see below), whose sum is σ = 935297280. Its totient is φ = 701204928.

The previous prime is 818228713. The next prime is 818228777. The reversal of 818228761 is 167822818.

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

It is a cyclic number.

It is not a de Polignac number, because 818228761 - 2¹⁷ = 818097689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818228791) 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 7 ways as a sum of consecutive naturals, for example, 51600 + ... + 65566.

It is an arithmetic number, because the mean of its divisors is an integer number (116912160).

Almost surely, 2^818228761 is an apocalyptic number.

It is an amenable number.

818228761 is a deficient number, since it is larger than the sum of its proper divisors (117068519).

818228761 is a wasteful number, since it uses less digits than its factorization.

818228761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22343.

The product of its digits is 86016, while the sum is 43.

The square root of 818228761 is about 28604.6982329826. The cubic root of 818228761 is about 935.3157487366.

The spelling of 818228761 in words is "eight hundred eighteen million, two hundred twenty-eight thousand, seven hundred sixty-one".