646020455611 has 2 divisors, whose sum is σ = 646020455612. Its totient is φ = 646020455610.

The previous prime is 646020455599. The next prime is 646020455681. The reversal of 646020455611 is 116554020646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646020455611 - 2²¹ = 646018358459 is a prime.

It is not a weakly prime, because it can be changed into another prime (646020455681) 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, 323010227805 + 323010227806.

It is an arithmetic number, because the mean of its divisors is an integer number (323010227806).

Almost surely, 2^646020455611 is an apocalyptic number.

646020455611 is a deficient number, since it is larger than the sum of its proper divisors (1).

646020455611 is an equidigital number, since it uses as much as digits as its factorization.

646020455611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 646020455611 in words is "six hundred forty-six billion, twenty million, four hundred fifty-five thousand, six hundred eleven".