808623398881 has 2 divisors, whose sum is σ = 808623398882. Its totient is φ = 808623398880.

The previous prime is 808623398867. The next prime is 808623398899. The reversal of 808623398881 is 188893326808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445177190656 + 363446208225 = 667216^2 + 602865^2 .

It is a cyclic number.

It is not a de Polignac number, because 808623398881 - 2¹⁹ = 808622874593 is a prime.

It is a super-2 number, since 2×808623398881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (808623398801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404311699440 + 404311699441.

It is an arithmetic number, because the mean of its divisors is an integer number (404311699441).

Almost surely, 2^808623398881 is an apocalyptic number.

It is an amenable number.

808623398881 is a deficient number, since it is larger than the sum of its proper divisors (1).

808623398881 is an equidigital number, since it uses as much as digits as its factorization.

808623398881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31850496, while the sum is 64.

It can be divided in two parts, 80862 and 3398881, that added together give a palindrome (3479743).

The spelling of 808623398881 in words is "eight hundred eight billion, six hundred twenty-three million, three hundred ninety-eight thousand, eight hundred eighty-one".