65329651991 has 2 divisors, whose sum is σ = 65329651992. Its totient is φ = 65329651990.

The previous prime is 65329651921. The next prime is 65329651997. The reversal of 65329651991 is 19915692356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65329651991 - 2¹⁸ = 65329389847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65329651997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32664825995 + 32664825996.

It is an arithmetic number, because the mean of its divisors is an integer number (32664825996).

Almost surely, 2^65329651991 is an apocalyptic number.

65329651991 is a deficient number, since it is larger than the sum of its proper divisors (1).

65329651991 is an equidigital number, since it uses as much as digits as its factorization.

65329651991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3936600, while the sum is 56.

The spelling of 65329651991 in words is "sixty-five billion, three hundred twenty-nine million, six hundred fifty-one thousand, nine hundred ninety-one".