2064645791 has 6 divisors (see below), whose sum is σ = 2235681720. Its totient is φ = 1905826728.

The previous prime is 2064645757. The next prime is 2064645797. The reversal of 2064645791 is 1975464602.

It is not a de Polignac number, because 2064645791 - 2⁶ = 2064645727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064645797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6108251 + ... + 6108588.

It is an arithmetic number, because the mean of its divisors is an integer number (372613620).

Almost surely, 2^2064645791 is an apocalyptic number.

2064645791 is a deficient number, since it is larger than the sum of its proper divisors (171035929).

2064645791 is a wasteful number, since it uses less digits than its factorization.

2064645791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216865 (or 12216852 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 2064645791 is about 45438.3735514378. The cubic root of 2064645791 is about 1273.3521279004.

The spelling of 2064645791 in words is "two billion, sixty-four million, six hundred forty-five thousand, seven hundred ninety-one".