2146805065 has 4 divisors (see below), whose sum is σ = 2576166084. Its totient is φ = 1717444048.

The previous prime is 2146805051. The next prime is 2146805081. The reversal of 2146805065 is 5605086412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1444608064 + 702197001 = 38008^2 + 26499^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146805065 - 2⁷ = 2146804937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214680502 + ... + 214680511.

It is an arithmetic number, because the mean of its divisors is an integer number (644041521).

Almost surely, 2^2146805065 is an apocalyptic number.

It is an amenable number.

2146805065 is a deficient number, since it is larger than the sum of its proper divisors (429361019).

2146805065 is an equidigital number, since it uses as much as digits as its factorization.

2146805065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429361018.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 2146805065 is about 46333.6277988245. The cubic root of 2146805065 is about 1290.0232483842.

The spelling of 2146805065 in words is "two billion, one hundred forty-six million, eight hundred five thousand, sixty-five".