64605636620227 has 2 divisors, whose sum is σ = 64605636620228. Its totient is φ = 64605636620226.

The previous prime is 64605636620141. The next prime is 64605636620279. The reversal of 64605636620227 is 72202663650646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64605636620227 - 2¹¹ = 64605636618179 is a prime.

It is not a weakly prime, because it can be changed into another prime (64605636626227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32302818310113 + 32302818310114.

It is an arithmetic number, because the mean of its divisors is an integer number (32302818310114).

Almost surely, 2^{64605636620227} is an apocalyptic number.

64605636620227 is a deficient number, since it is larger than the sum of its proper divisors (1).

64605636620227 is an equidigital number, since it uses as much as digits as its factorization.

64605636620227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 55.

The spelling of 64605636620227 in words is "sixty-four trillion, six hundred five billion, six hundred thirty-six million, six hundred twenty thousand, two hundred twenty-seven".