7645806689 has 2 divisors, whose sum is σ = 7645806690. Its totient is φ = 7645806688.

The previous prime is 7645806683. The next prime is 7645806691. The reversal of 7645806689 is 9866085467.

7645806689 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., 6332976400 + 1312830289 = 79580^2 + 36233^2 .

It is a cyclic number.

It is not a de Polignac number, because 7645806689 - 2⁸ = 7645806433 is a prime.

Together with 7645806691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7645806683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3822903344 + 3822903345.

It is an arithmetic number, because the mean of its divisors is an integer number (3822903345).

Almost surely, 2^7645806689 is an apocalyptic number.

It is an amenable number.

7645806689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7645806689 is an equidigital number, since it uses as much as digits as its factorization.

7645806689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The square root of 7645806689 is about 87440.3035733523. The cubic root of 7645806689 is about 1970.0372491604.

The spelling of 7645806689 in words is "seven billion, six hundred forty-five million, eight hundred six thousand, six hundred eighty-nine".