1641770217233 has 2 divisors, whose sum is σ = 1641770217234. Its totient is φ = 1641770217232.

The previous prime is 1641770217187. The next prime is 1641770217289. The reversal of 1641770217233 is 3327120771461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1343427037969 + 298343179264 = 1159063^2 + 546208^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641770217233 - 2³⁴ = 1624590348049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641770217833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820885108616 + 820885108617.

It is an arithmetic number, because the mean of its divisors is an integer number (820885108617).

Almost surely, 2^{1641770217233} is an apocalyptic number.

It is an amenable number.

1641770217233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641770217233 is an equidigital number, since it uses as much as digits as its factorization.

1641770217233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 44.

Adding to 1641770217233 its reverse (3327120771461), we get a palindrome (4968890988694).

The spelling of 1641770217233 in words is "one trillion, six hundred forty-one billion, seven hundred seventy million, two hundred seventeen thousand, two hundred thirty-three".