65564444137 has 2 divisors, whose sum is σ = 65564444138. Its totient is φ = 65564444136.

The previous prime is 65564444003. The next prime is 65564444159. The reversal of 65564444137 is 73144446556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53372088576 + 12192355561 = 231024^2 + 110419^2 .

It is a cyclic number.

It is not a de Polignac number, because 65564444137 - 2¹⁹ = 65563919849 is a prime.

It is not a weakly prime, because it can be changed into another prime (65564444177) 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, 32782222068 + 32782222069.

It is an arithmetic number, because the mean of its divisors is an integer number (32782222069).

Almost surely, 2^65564444137 is an apocalyptic number.

It is an amenable number.

65564444137 is a deficient number, since it is larger than the sum of its proper divisors (1).

65564444137 is an equidigital number, since it uses as much as digits as its factorization.

65564444137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 49.

The spelling of 65564444137 in words is "sixty-five billion, five hundred sixty-four million, four hundred forty-four thousand, one hundred thirty-seven".