65699438047489 has 2 divisors, whose sum is σ = 65699438047490. Its totient is φ = 65699438047488.

The previous prime is 65699438047487. The next prime is 65699438047597. The reversal of 65699438047489 is 98474083499656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64158818406400 + 1540619641089 = 8009920^2 + 1241217^2 .

It is a cyclic number.

It is not a de Polignac number, because 65699438047489 - 2¹ = 65699438047487 is a prime.

Together with 65699438047487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65699438047487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32849719023744 + 32849719023745.

It is an arithmetic number, because the mean of its divisors is an integer number (32849719023745).

Almost surely, 2^{65699438047489} is an apocalyptic number.

It is an amenable number.

65699438047489 is a deficient number, since it is larger than the sum of its proper divisors (1).

65699438047489 is an equidigital number, since it uses as much as digits as its factorization.

65699438047489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11287019520, while the sum is 82.

The spelling of 65699438047489 in words is "sixty-five trillion, six hundred ninety-nine billion, four hundred thirty-eight million, forty-seven thousand, four hundred eighty-nine".