5645321161 has 2 divisors, whose sum is σ = 5645321162. Its totient is φ = 5645321160.

The previous prime is 5645321159. The next prime is 5645321197. The reversal of 5645321161 is 1611235465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4365112761 + 1280208400 = 66069^2 + 35780^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645321161 - 2¹ = 5645321159 is a prime.

Together with 5645321159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5645321141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822660580 + 2822660581.

It is an arithmetic number, because the mean of its divisors is an integer number (2822660581).

Almost surely, 2^5645321161 is an apocalyptic number.

It is an amenable number.

5645321161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645321161 is an equidigital number, since it uses as much as digits as its factorization.

5645321161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 5645321161 is about 75135.3522717502. The cubic root of 5645321161 is about 1780.5857140148.

The spelling of 5645321161 in words is "five billion, six hundred forty-five million, three hundred twenty-one thousand, one hundred sixty-one".