2065915985 has 16 divisors (see below), whose sum is σ = 2855571456. Its totient is φ = 1405470528.

The previous prime is 2065915937. The next prime is 2065915993. The reversal of 2065915985 is 5895195602.

It is not a de Polignac number, because 2065915985 - 2²⁴ = 2049138769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227942 + ... + 236831.

It is an arithmetic number, because the mean of its divisors is an integer number (178473216).

Almost surely, 2^2065915985 is an apocalyptic number.

It is an amenable number.

2065915985 is a deficient number, since it is larger than the sum of its proper divisors (789655471).

2065915985 is a wasteful number, since it uses less digits than its factorization.

2065915985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464912.

The product of its (nonzero) digits is 972000, while the sum is 50.

The square root of 2065915985 is about 45452.3485091805. The cubic root of 2065915985 is about 1273.6132013609.

The spelling of 2065915985 in words is "two billion, sixty-five million, nine hundred fifteen thousand, nine hundred eighty-five".