6402664193 has 2 divisors, whose sum is σ = 6402664194. Its totient is φ = 6402664192.

The previous prime is 6402664171. The next prime is 6402664201. The reversal of 6402664193 is 3914662046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5777064049 + 625600144 = 76007^2 + 25012^2 .

It is a cyclic number.

It is not a de Polignac number, because 6402664193 - 2⁸ = 6402663937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6402664193.

It is not a weakly prime, because it can be changed into another prime (6402664133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201332096 + 3201332097.

It is an arithmetic number, because the mean of its divisors is an integer number (3201332097).

Almost surely, 2^6402664193 is an apocalyptic number.

It is an amenable number.

6402664193 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402664193 is an equidigital number, since it uses as much as digits as its factorization.

6402664193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 6402664193 is about 80016.6494737189. The cubic root of 6402664193 is about 1856.8931245484.

The spelling of 6402664193 in words is "six billion, four hundred two million, six hundred sixty-four thousand, one hundred ninety-three".