65319918073 has 2 divisors, whose sum is σ = 65319918074. Its totient is φ = 65319918072.

The previous prime is 65319918047. The next prime is 65319918161. The reversal of 65319918073 is 37081991356.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54015337744 + 11304580329 = 232412^2 + 106323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65319918073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65319918073.

It is not a weakly prime, because it can be changed into another prime (65319918173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32659959036 + 32659959037.

It is an arithmetic number, because the mean of its divisors is an integer number (32659959037).

Almost surely, 2^65319918073 is an apocalyptic number.

It is an amenable number.

65319918073 is a deficient number, since it is larger than the sum of its proper divisors (1).

65319918073 is an equidigital number, since it uses as much as digits as its factorization.

65319918073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 65319918073 in words is "sixty-five billion, three hundred nineteen million, nine hundred eighteen thousand, seventy-three".