805223646553 has 2 divisors, whose sum is σ = 805223646554. Its totient is φ = 805223646552.

The previous prime is 805223646551. The next prime is 805223646697. The reversal of 805223646553 is 355646322508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686995637904 + 118228008649 = 828852^2 + 343843^2 .

It is a cyclic number.

It is not a de Polignac number, because 805223646553 - 2¹ = 805223646551 is a prime.

It is a super-2 number, since 2×805223646553² (a number of 25 digits) contains 22 as substring.

Together with 805223646551, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 805223646497 and 805223646506.

It is not a weakly prime, because it can be changed into another prime (805223646551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402611823276 + 402611823277.

It is an arithmetic number, because the mean of its divisors is an integer number (402611823277).

Almost surely, 2^805223646553 is an apocalyptic number.

It is an amenable number.

805223646553 is a deficient number, since it is larger than the sum of its proper divisors (1).

805223646553 is an equidigital number, since it uses as much as digits as its factorization.

805223646553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 805223646553 in words is "eight hundred five billion, two hundred twenty-three million, six hundred forty-six thousand, five hundred fifty-three".