65497259273 has 2 divisors, whose sum is σ = 65497259274. Its totient is φ = 65497259272.

The previous prime is 65497259171. The next prime is 65497259329. The reversal of 65497259273 is 37295279456.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61400875264 + 4096384009 = 247792^2 + 64003^2 .

It is a cyclic number.

It is not a de Polignac number, because 65497259273 - 2³⁰ = 64423517449 is a prime.

It is not a weakly prime, because it can be changed into another prime (65497253273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32748629636 + 32748629637.

It is an arithmetic number, because the mean of its divisors is an integer number (32748629637).

Almost surely, 2^65497259273 is an apocalyptic number.

It is an amenable number.

65497259273 is a deficient number, since it is larger than the sum of its proper divisors (1).

65497259273 is an equidigital number, since it uses as much as digits as its factorization.

65497259273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 59.

The spelling of 65497259273 in words is "sixty-five billion, four hundred ninety-seven million, two hundred fifty-nine thousand, two hundred seventy-three".