646773846071 has 2 divisors, whose sum is σ = 646773846072. Its totient is φ = 646773846070.

The previous prime is 646773846053. The next prime is 646773846077. The reversal of 646773846071 is 170648377646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646773846071 is a prime.

It is a super-2 number, since 2×646773846071² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646773846071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646773846077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323386923035 + 323386923036.

It is an arithmetic number, because the mean of its divisors is an integer number (323386923036).

Almost surely, 2^646773846071 is an apocalyptic number.

646773846071 is a deficient number, since it is larger than the sum of its proper divisors (1).

646773846071 is an equidigital number, since it uses as much as digits as its factorization.

646773846071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28449792, while the sum is 59.

The spelling of 646773846071 in words is "six hundred forty-six billion, seven hundred seventy-three million, eight hundred forty-six thousand, seventy-one".