65149236517 has 2 divisors, whose sum is σ = 65149236518. Its totient is φ = 65149236516.

The previous prime is 65149236491. The next prime is 65149236533. The reversal of 65149236517 is 71563294156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42166979716 + 22982256801 = 205346^2 + 151599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65149236517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65149236547) 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, 32574618258 + 32574618259.

It is an arithmetic number, because the mean of its divisors is an integer number (32574618259).

Almost surely, 2^65149236517 is an apocalyptic number.

It is an amenable number.

65149236517 is a deficient number, since it is larger than the sum of its proper divisors (1).

65149236517 is an equidigital number, since it uses as much as digits as its factorization.

65149236517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The spelling of 65149236517 in words is "sixty-five billion, one hundred forty-nine million, two hundred thirty-six thousand, five hundred seventeen".