664098490193 has 2 divisors, whose sum is σ = 664098490194. Its totient is φ = 664098490192.

The previous prime is 664098490183. The next prime is 664098490219. The reversal of 664098490193 is 391094890466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345001167424 + 319097322769 = 587368^2 + 564887^2 .

It is a cyclic number.

It is not a de Polignac number, because 664098490193 - 2⁶ = 664098490129 is a prime.

It is not a weakly prime, because it can be changed into another prime (664098490183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332049245096 + 332049245097.

It is an arithmetic number, because the mean of its divisors is an integer number (332049245097).

Almost surely, 2^664098490193 is an apocalyptic number.

It is an amenable number.

664098490193 is a deficient number, since it is larger than the sum of its proper divisors (1).

664098490193 is an equidigital number, since it uses as much as digits as its factorization.

664098490193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 59.

The spelling of 664098490193 in words is "six hundred sixty-four billion, ninety-eight million, four hundred ninety thousand, one hundred ninety-three".