65816261633 has 2 divisors, whose sum is σ = 65816261634. Its totient is φ = 65816261632.

The previous prime is 65816261579. The next prime is 65816261647. The reversal of 65816261633 is 33616261856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65294047729 + 522213904 = 255527^2 + 22852^2 .

It is a cyclic number.

It is not a de Polignac number, because 65816261633 - 2⁸ = 65816261377 is a prime.

It is not a weakly prime, because it can be changed into another prime (65816261663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32908130816 + 32908130817.

It is an arithmetic number, because the mean of its divisors is an integer number (32908130817).

Almost surely, 2^65816261633 is an apocalyptic number.

It is an amenable number.

65816261633 is a deficient number, since it is larger than the sum of its proper divisors (1).

65816261633 is an equidigital number, since it uses as much as digits as its factorization.

65816261633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The spelling of 65816261633 in words is "sixty-five billion, eight hundred sixteen million, two hundred sixty-one thousand, six hundred thirty-three".