818449910881 has 8 divisors (see below), whose sum is σ = 862081002720. Its totient is φ = 774874297152.

The previous prime is 818449910821. The next prime is 818449910891. The reversal of 818449910881 is 188019944818.

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 818449910881 - 2¹⁷ = 818449779809 is a prime.

It is a super-2 number, since 2×818449910881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818449910801) 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, 13839235 + ... + 13898248.

It is an arithmetic number, because the mean of its divisors is an integer number (107760125340).

Almost surely, 2^818449910881 is an apocalyptic number.

It is an amenable number.

818449910881 is a deficient number, since it is larger than the sum of its proper divisors (43631091839).

818449910881 is a wasteful number, since it uses less digits than its factorization.

818449910881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27739055.

The product of its (nonzero) digits is 5308416, while the sum is 61.

The spelling of 818449910881 in words is "eight hundred eighteen billion, four hundred forty-nine million, nine hundred ten thousand, eight hundred eighty-one".