2065601605 has 4 divisors (see below), whose sum is σ = 2478721932. Its totient is φ = 1652481280.

The previous prime is 2065601599. The next prime is 2065601717. The reversal of 2065601605 is 5061065602.

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 279524961 + 1786076644 = 16719^2 + 42262^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2065601605 is a prime.

It is a Duffinian number.

It is a congruent 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, 206560156 + ... + 206560165.

It is an arithmetic number, because the mean of its divisors is an integer number (619680483).

Almost surely, 2^2065601605 is an apocalyptic number.

It is an amenable number.

2065601605 is a deficient number, since it is larger than the sum of its proper divisors (413120327).

2065601605 is an equidigital number, since it uses as much as digits as its factorization.

2065601605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413120326.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2065601605 is about 45448.8900304507. The cubic root of 2065601605 is about 1273.5485942112.

The spelling of 2065601605 in words is "two billion, sixty-five million, six hundred one thousand, six hundred five".