65447295889 has 2 divisors, whose sum is σ = 65447295890. Its totient is φ = 65447295888.

The previous prime is 65447295847. The next prime is 65447295911. The reversal of 65447295889 is 98859274456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52082086225 + 13365209664 = 228215^2 + 115608^2 .

It is a cyclic number.

It is not a de Polignac number, because 65447295889 - 2¹⁹ = 65446771601 is a prime.

It is not a weakly prime, because it can be changed into another prime (65447295989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32723647944 + 32723647945.

It is an arithmetic number, because the mean of its divisors is an integer number (32723647945).

Almost surely, 2^65447295889 is an apocalyptic number.

It is an amenable number.

65447295889 is a deficient number, since it is larger than the sum of its proper divisors (1).

65447295889 is an equidigital number, since it uses as much as digits as its factorization.

65447295889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174182400, while the sum is 67.

The spelling of 65447295889 in words is "sixty-five billion, four hundred forty-seven million, two hundred ninety-five thousand, eight hundred eighty-nine".