65072235509 has 2 divisors, whose sum is σ = 65072235510. Its totient is φ = 65072235508.

The previous prime is 65072235497. The next prime is 65072235541. The reversal of 65072235509 is 90553227056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51318106225 + 13754129284 = 226535^2 + 117278^2 .

It is a cyclic number.

It is not a de Polignac number, because 65072235509 - 2⁴ = 65072235493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65072235509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65072235589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32536117754 + 32536117755.

It is an arithmetic number, because the mean of its divisors is an integer number (32536117755).

Almost surely, 2^65072235509 is an apocalyptic number.

It is an amenable number.

65072235509 is a deficient number, since it is larger than the sum of its proper divisors (1).

65072235509 is an equidigital number, since it uses as much as digits as its factorization.

65072235509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567000, while the sum is 44.

The spelling of 65072235509 in words is "sixty-five billion, seventy-two million, two hundred thirty-five thousand, five hundred nine".