646380611 has 2 divisors, whose sum is σ = 646380612. Its totient is φ = 646380610.

The previous prime is 646380571. The next prime is 646380629. The reversal of 646380611 is 116083646.

646380611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646380611 - 2¹⁴ = 646364227 is a prime.

It is not a weakly prime, because it can be changed into another prime (646380641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323190305 + 323190306.

It is an arithmetic number, because the mean of its divisors is an integer number (323190306).

Almost surely, 2^646380611 is an apocalyptic number.

646380611 is a deficient number, since it is larger than the sum of its proper divisors (1).

646380611 is an equidigital number, since it uses as much as digits as its factorization.

646380611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 646380611 is about 25424.0164214862. The cubic root of 646380611 is about 864.6282880599.

The spelling of 646380611 in words is "six hundred forty-six million, three hundred eighty thousand, six hundred eleven".