647631065099 has 2 divisors, whose sum is σ = 647631065100. Its totient is φ = 647631065098.

The previous prime is 647631065077. The next prime is 647631065189. The reversal of 647631065099 is 990560136746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647631065099 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (647631065009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323815532549 + 323815532550.

It is an arithmetic number, because the mean of its divisors is an integer number (323815532550).

Almost surely, 2^647631065099 is an apocalyptic number.

647631065099 is a deficient number, since it is larger than the sum of its proper divisors (1).

647631065099 is an equidigital number, since it uses as much as digits as its factorization.

647631065099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 647631065099 in words is "six hundred forty-seven billion, six hundred thirty-one million, sixty-five thousand, ninety-nine".