818408052281 has 8 divisors (see below), whose sum is σ = 844917525504. Its totient is φ = 791905404960.

The previous prime is 818408052233. The next prime is 818408052353. The reversal of 818408052281 is 182250804818.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818408052281 is a prime.

It is a super-2 number, since 2×818408052281² (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 (818408051281) 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, 1462241 + ... + 1942926.

It is an arithmetic number, because the mean of its divisors is an integer number (105614690688).

Almost surely, 2^818408052281 is an apocalyptic number.

It is an amenable number.

818408052281 is a deficient number, since it is larger than the sum of its proper divisors (26509473223).

818408052281 is a wasteful number, since it uses less digits than its factorization.

818408052281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412951.

The product of its (nonzero) digits is 327680, while the sum is 47.

The spelling of 818408052281 in words is "eight hundred eighteen billion, four hundred eight million, fifty-two thousand, two hundred eighty-one".