647766092201 has 2 divisors, whose sum is σ = 647766092202. Its totient is φ = 647766092200.

The previous prime is 647766092081. The next prime is 647766092203. The reversal of 647766092201 is 102290667746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355425822976 + 292340269225 = 596176^2 + 540685^2 .

It is a cyclic number.

It is not a de Polignac number, because 647766092201 - 2¹⁰ = 647766091177 is a prime.

Together with 647766092203, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647766092201.

It is not a weakly prime, because it can be changed into another prime (647766092203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323883046100 + 323883046101.

It is an arithmetic number, because the mean of its divisors is an integer number (323883046101).

Almost surely, 2^647766092201 is an apocalyptic number.

It is an amenable number.

647766092201 is a deficient number, since it is larger than the sum of its proper divisors (1).

647766092201 is an equidigital number, since it uses as much as digits as its factorization.

647766092201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 647766092201 in words is "six hundred forty-seven billion, seven hundred sixty-six million, ninety-two thousand, two hundred one".