64605636220201 has 2 divisors, whose sum is σ = 64605636220202. Its totient is φ = 64605636220200.

The previous prime is 64605636220093. The next prime is 64605636220241. The reversal of 64605636220201 is 10202263650646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50408565810201 + 14197070410000 = 7099899^2 + 3767900^2 .

It is a cyclic number.

It is not a de Polignac number, because 64605636220201 - 2²³ = 64605627831593 is a prime.

It is not a weakly prime, because it can be changed into another prime (64605636220241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32302818110100 + 32302818110101.

It is an arithmetic number, because the mean of its divisors is an integer number (32302818110101).

Almost surely, 2^{64605636220201} is an apocalyptic number.

It is an amenable number.

64605636220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

64605636220201 is an equidigital number, since it uses as much as digits as its factorization.

64605636220201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 43.

Adding to 64605636220201 its reverse (10202263650646), we get a palindrome (74807899870847).

The spelling of 64605636220201 in words is "sixty-four trillion, six hundred five billion, six hundred thirty-six million, two hundred twenty thousand, two hundred one".