65204045060621 has 2 divisors, whose sum is σ = 65204045060622. Its totient is φ = 65204045060620.

The previous prime is 65204045060591. The next prime is 65204045060629. The reversal of 65204045060621 is 12606054040256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48859247223721 + 16344797836900 = 6989939^2 + 4042870^2 .

It is a cyclic number.

It is not a de Polignac number, because 65204045060621 - 2³⁸ = 64929167153677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65204045060629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32602022530310 + 32602022530311.

It is an arithmetic number, because the mean of its divisors is an integer number (32602022530311).

Almost surely, 2^{65204045060621} is an apocalyptic number.

It is an amenable number.

65204045060621 is a deficient number, since it is larger than the sum of its proper divisors (1).

65204045060621 is an equidigital number, since it uses as much as digits as its factorization.

65204045060621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 65204045060621 in words is "sixty-five trillion, two hundred four billion, forty-five million, sixty thousand, six hundred twenty-one".