65245164243991 has 2 divisors, whose sum is σ = 65245164243992. Its totient is φ = 65245164243990.

The previous prime is 65245164243967. The next prime is 65245164244097. The reversal of 65245164243991 is 19934246154256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65245164243991 - 2¹³ = 65245164235799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65245164241991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32622582121995 + 32622582121996.

It is an arithmetic number, because the mean of its divisors is an integer number (32622582121996).

Almost surely, 2^{65245164243991} is an apocalyptic number.

65245164243991 is a deficient number, since it is larger than the sum of its proper divisors (1).

65245164243991 is an equidigital number, since it uses as much as digits as its factorization.

65245164243991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55987200, while the sum is 61.

The spelling of 65245164243991 in words is "sixty-five trillion, two hundred forty-five billion, one hundred sixty-four million, two hundred forty-three thousand, nine hundred ninety-one".