646550096573 has 2 divisors, whose sum is σ = 646550096574. Its totient is φ = 646550096572.

The previous prime is 646550096527. The next prime is 646550096579. The reversal of 646550096573 is 375690055646.

It is a happy number.

646550096573 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 can be written as a sum of positive squares in only one way, i.e., 504068760484 + 142481336089 = 709978^2 + 377467^2 .

It is a cyclic number.

It is not a de Polignac number, because 646550096573 - 2¹⁶ = 646550031037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646550096579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323275048286 + 323275048287.

It is an arithmetic number, because the mean of its divisors is an integer number (323275048287).

Almost surely, 2^646550096573 is an apocalyptic number.

It is an amenable number.

646550096573 is a deficient number, since it is larger than the sum of its proper divisors (1).

646550096573 is an equidigital number, since it uses as much as digits as its factorization.

646550096573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412000, while the sum is 56.

The spelling of 646550096573 in words is "six hundred forty-six billion, five hundred fifty million, ninety-six thousand, five hundred seventy-three".