6395988769 has 2 divisors, whose sum is σ = 6395988770. Its totient is φ = 6395988768.

The previous prime is 6395988763. The next prime is 6395988803. The reversal of 6395988769 is 9678895936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6332180625 + 63808144 = 79575^2 + 7988^2 .

It is a cyclic number.

It is not a de Polignac number, because 6395988769 - 2⁵ = 6395988737 is a prime.

It is a super-2 number, since 2×6395988769² = 81817344666348270722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6395988698 and 6395988707.

It is not a weakly prime, because it can be changed into another prime (6395988763) 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, 3197994384 + 3197994385.

It is an arithmetic number, because the mean of its divisors is an integer number (3197994385).

Almost surely, 2^6395988769 is an apocalyptic number.

It is an amenable number.

6395988769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6395988769 is an equidigital number, since it uses as much as digits as its factorization.

6395988769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176359680, while the sum is 70.

The square root of 6395988769 is about 79974.9258768022. The cubic root of 6395988769 is about 1856.2475672760.

The spelling of 6395988769 in words is "six billion, three hundred ninety-five million, nine hundred eighty-eight thousand, seven hundred sixty-nine".