65273303257 has 4 divisors (see below), whose sum is σ = 65437720036. Its totient is φ = 65108886480.

The previous prime is 65273303243. The next prime is 65273303279. The reversal of 65273303257 is 75230337256.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25441526016 + 39831777241 = 159504^2 + 199579^2 .

It is a cyclic number.

It is not a de Polignac number, because 65273303257 - 2⁷ = 65273303129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65273303297) 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 in 3 ways as a sum of consecutive naturals, for example, 82207794 + ... + 82208587.

It is an arithmetic number, because the mean of its divisors is an integer number (16359430009).

Almost surely, 2^65273303257 is an apocalyptic number.

It is an amenable number.

65273303257 is a deficient number, since it is larger than the sum of its proper divisors (164416779).

65273303257 is a wasteful number, since it uses less digits than its factorization.

65273303257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164416778.

The product of its (nonzero) digits is 793800, while the sum is 43.

The spelling of 65273303257 in words is "sixty-five billion, two hundred seventy-three million, three hundred three thousand, two hundred fifty-seven".