868210650647 has 2 divisors, whose sum is σ = 868210650648. Its totient is φ = 868210650646.

The previous prime is 868210650641. The next prime is 868210650649. The reversal of 868210650647 is 746056012868.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868210650647 - 2⁶ = 868210650583 is a prime.

Together with 868210650649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868210650641) 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, 434105325323 + 434105325324.

It is an arithmetic number, because the mean of its divisors is an integer number (434105325324).

Almost surely, 2^868210650647 is an apocalyptic number.

868210650647 is a deficient number, since it is larger than the sum of its proper divisors (1).

868210650647 is an equidigital number, since it uses as much as digits as its factorization.

868210650647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 868210650647 in words is "eight hundred sixty-eight billion, two hundred ten million, six hundred fifty thousand, six hundred forty-seven".