646524232897 has 2 divisors, whose sum is σ = 646524232898. Its totient is φ = 646524232896.

The previous prime is 646524232883. The next prime is 646524232909. The reversal of 646524232897 is 798232425646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334695803841 + 311828429056 = 578529^2 + 558416^2 .

It is a cyclic number.

It is not a de Polignac number, because 646524232897 - 2³¹ = 644376749249 is a prime.

It is not a weakly prime, because it can be changed into another prime (646524232817) 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, 323262116448 + 323262116449.

It is an arithmetic number, because the mean of its divisors is an integer number (323262116449).

Almost surely, 2^646524232897 is an apocalyptic number.

It is an amenable number.

646524232897 is a deficient number, since it is larger than the sum of its proper divisors (1).

646524232897 is an equidigital number, since it uses as much as digits as its factorization.

646524232897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34836480, while the sum is 58.

The spelling of 646524232897 in words is "six hundred forty-six billion, five hundred twenty-four million, two hundred thirty-two thousand, eight hundred ninety-seven".