2065642065 has 48 divisors (see below), whose sum is σ = 3705461760. Its totient is φ = 1063393920.

The previous prime is 2065642049. The next prime is 2065642079. The reversal of 2065642065 is 5602465602.

2065642065 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 642 + 0 + 6 + 5 = 666.

It is not a de Polignac number, because 2065642065 - 2⁴ = 2065642049 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 610719 + ... + 614091.

It is an arithmetic number, because the mean of its divisors is an integer number (77197120).

Almost surely, 2^2065642065 is an apocalyptic number.

It is an amenable number.

2065642065 is a deficient number, since it is larger than the sum of its proper divisors (1639819695).

2065642065 is a wasteful number, since it uses less digits than its factorization.

2065642065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854 (or 3851 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2065642065 is about 45449.3351436520. The cubic root of 2065642065 is about 1273.5569093738.

The spelling of 2065642065 in words is "two billion, sixty-five million, six hundred forty-two thousand, sixty-five".