65923491481 has 2 divisors, whose sum is σ = 65923491482. Its totient is φ = 65923491480.

The previous prime is 65923491437. The next prime is 65923491511. The reversal of 65923491481 is 18419432956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61561549456 + 4361942025 = 248116^2 + 66045^2 .

It is a cyclic number.

It is not a de Polignac number, because 65923491481 - 2²³ = 65915102873 is a prime.

It is a super-2 number, since 2×65923491481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65923491401) 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, 32961745740 + 32961745741.

It is an arithmetic number, because the mean of its divisors is an integer number (32961745741).

Almost surely, 2^65923491481 is an apocalyptic number.

It is an amenable number.

65923491481 is a deficient number, since it is larger than the sum of its proper divisors (1).

65923491481 is an equidigital number, since it uses as much as digits as its factorization.

65923491481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The spelling of 65923491481 in words is "sixty-five billion, nine hundred twenty-three million, four hundred ninety-one thousand, four hundred eighty-one".