7664315641 has 2 divisors, whose sum is σ = 7664315642. Its totient is φ = 7664315640.

The previous prime is 7664315621. The next prime is 7664315647. The reversal of 7664315641 is 1465134667.

7664315641 is digitally balanced in base 3, 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., 6561810025 + 1102505616 = 81005^2 + 33204^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664315641 - 2⁹ = 7664315129 is a prime.

It is not a weakly prime, because it can be changed into another prime (7664315647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832157820 + 3832157821.

It is an arithmetic number, because the mean of its divisors is an integer number (3832157821).

Almost surely, 2^7664315641 is an apocalyptic number.

It is an amenable number.

7664315641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664315641 is an equidigital number, since it uses as much as digits as its factorization.

7664315641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 7664315641 is about 87546.0772450714. The cubic root of 7664315641 is about 1971.6256553909.

The spelling of 7664315641 in words is "seven billion, six hundred sixty-four million, three hundred fifteen thousand, six hundred forty-one".