816262262657 has 2 divisors, whose sum is σ = 816262262658. Its totient is φ = 816262262656.

The previous prime is 816262262609. The next prime is 816262262671. The reversal of 816262262657 is 756262262618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 599813074576 + 216449188081 = 774476^2 + 465241^2 .

It is a cyclic number.

It is not a de Polignac number, because 816262262657 - 2¹⁴ = 816262246273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 816262262599 and 816262262608.

It is not a weakly prime, because it can be changed into another prime (816262261657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408131131328 + 408131131329.

It is an arithmetic number, because the mean of its divisors is an integer number (408131131329).

Almost surely, 2^816262262657 is an apocalyptic number.

It is an amenable number.

816262262657 is a deficient number, since it is larger than the sum of its proper divisors (1).

816262262657 is an equidigital number, since it uses as much as digits as its factorization.

816262262657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 53.

The spelling of 816262262657 in words is "eight hundred sixteen billion, two hundred sixty-two million, two hundred sixty-two thousand, six hundred fifty-seven".