6400759697 has 2 divisors, whose sum is σ = 6400759698. Its totient is φ = 6400759696.

The previous prime is 6400759693. The next prime is 6400759733. The reversal of 6400759697 is 7969570046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5578446721 + 822312976 = 74689^2 + 28676^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400759697 - 2² = 6400759693 is a prime.

It is not a weakly prime, because it can be changed into another prime (6400759693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200379848 + 3200379849.

It is an arithmetic number, because the mean of its divisors is an integer number (3200379849).

Almost surely, 2^6400759697 is an apocalyptic number.

It is an amenable number.

6400759697 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400759697 is an equidigital number, since it uses as much as digits as its factorization.

6400759697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The square root of 6400759697 is about 80004.7479653552. The cubic root of 6400759697 is about 1856.7089930617.

The spelling of 6400759697 in words is "six billion, four hundred million, seven hundred fifty-nine thousand, six hundred ninety-seven".