65144217577 has 2 divisors, whose sum is σ = 65144217578. Its totient is φ = 65144217576.

The previous prime is 65144217569. The next prime is 65144217587. The reversal of 65144217577 is 77571244156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54769572841 + 10374644736 = 234029^2 + 101856^2 .

It is a cyclic number.

It is not a de Polignac number, because 65144217577 - 2³ = 65144217569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65144217577.

It is not a weakly prime, because it can be changed into another prime (65144217527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32572108788 + 32572108789.

It is an arithmetic number, because the mean of its divisors is an integer number (32572108789).

Almost surely, 2^65144217577 is an apocalyptic number.

It is an amenable number.

65144217577 is a deficient number, since it is larger than the sum of its proper divisors (1).

65144217577 is an equidigital number, since it uses as much as digits as its factorization.

65144217577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1646400, while the sum is 49.

The spelling of 65144217577 in words is "sixty-five billion, one hundred forty-four million, two hundred seventeen thousand, five hundred seventy-seven".