646524232831 has 2 divisors, whose sum is σ = 646524232832. Its totient is φ = 646524232830.

The previous prime is 646524232817. The next prime is 646524232883. The reversal of 646524232831 is 138232425646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646524232831 - 2⁵ = 646524232799 is a prime.

It is a super-2 number, since 2×646524232831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646524232231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323262116415 + 323262116416.

It is an arithmetic number, because the mean of its divisors is an integer number (323262116416).

Almost surely, 2^646524232831 is an apocalyptic number.

646524232831 is a deficient number, since it is larger than the sum of its proper divisors (1).

646524232831 is an equidigital number, since it uses as much as digits as its factorization.

646524232831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 46.

The spelling of 646524232831 in words is "six hundred forty-six billion, five hundred twenty-four million, two hundred thirty-two thousand, eight hundred thirty-one".