65320086989 has 2 divisors, whose sum is σ = 65320086990. Its totient is φ = 65320086988.

The previous prime is 65320086983. The next prime is 65320087031. The reversal of 65320086989 is 98968002356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64945974025 + 374112964 = 254845^2 + 19342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65320086989 is a prime.

It is a super-2 number, since 2×65320086989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65320086983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32660043494 + 32660043495.

It is an arithmetic number, because the mean of its divisors is an integer number (32660043495).

Almost surely, 2^65320086989 is an apocalyptic number.

It is an amenable number.

65320086989 is a deficient number, since it is larger than the sum of its proper divisors (1).

65320086989 is an equidigital number, since it uses as much as digits as its factorization.

65320086989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 65320086989 in words is "sixty-five billion, three hundred twenty million, eighty-six thousand, nine hundred eighty-nine".