4165321609 has 2 divisors, whose sum is σ = 4165321610. Its totient is φ = 4165321608.

The previous prime is 4165321577. The next prime is 4165321679. The reversal of 4165321609 is 9061235614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4122025209 + 43296400 = 64203^2 + 6580^2 .

It is a cyclic number.

It is not a de Polignac number, because 4165321609 - 2⁵ = 4165321577 is a prime.

It is not a weakly prime, because it can be changed into another prime (4165321679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2082660804 + 2082660805.

It is an arithmetic number, because the mean of its divisors is an integer number (2082660805).

Almost surely, 2^4165321609 is an apocalyptic number.

It is an amenable number.

4165321609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4165321609 is an equidigital number, since it uses as much as digits as its factorization.

4165321609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 4165321609 is about 64539.3028239382. The cubic root of 4165321609 is about 1608.9758038543.

The spelling of 4165321609 in words is "four billion, one hundred sixty-five million, three hundred twenty-one thousand, six hundred nine".