646341143653 has 2 divisors, whose sum is σ = 646341143654. Its totient is φ = 646341143652.

The previous prime is 646341143629. The next prime is 646341143677. The reversal of 646341143653 is 356341143646.

It is a balanced prime because it is at equal distance from previous prime (646341143629) and next prime (646341143677).

It can be written as a sum of positive squares in only one way, i.e., 646131415329 + 209728324 = 803823^2 + 14482^2 .

It is a cyclic number.

It is not a de Polignac number, because 646341143653 - 2⁹ = 646341143141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646341143603) 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, 323170571826 + 323170571827.

It is an arithmetic number, because the mean of its divisors is an integer number (323170571827).

Almost surely, 2^646341143653 is an apocalyptic number.

It is an amenable number.

646341143653 is a deficient number, since it is larger than the sum of its proper divisors (1).

646341143653 is an equidigital number, since it uses as much as digits as its factorization.

646341143653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 46.

The spelling of 646341143653 in words is "six hundred forty-six billion, three hundred forty-one million, one hundred forty-three thousand, six hundred fifty-three".