65327563637081 has 2 divisors, whose sum is σ = 65327563637082. Its totient is φ = 65327563637080.

The previous prime is 65327563637059. The next prime is 65327563637117. The reversal of 65327563637081 is 18073636572356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62326145985481 + 3001417651600 = 7894691^2 + 1732460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65327563637081 is a prime.

It is a super-2 number, since 2×65327563637081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65327563637981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32663781818540 + 32663781818541.

It is an arithmetic number, because the mean of its divisors is an integer number (32663781818541).

Almost surely, 2^{65327563637081} is an apocalyptic number.

It is an amenable number.

65327563637081 is a deficient number, since it is larger than the sum of its proper divisors (1).

65327563637081 is an equidigital number, since it uses as much as digits as its factorization.

65327563637081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114307200, while the sum is 62.

The spelling of 65327563637081 in words is "sixty-five trillion, three hundred twenty-seven billion, five hundred sixty-three million, six hundred thirty-seven thousand, eighty-one".