6485775845 has 4 divisors (see below), whose sum is σ = 7782931020. Its totient is φ = 5188620672.

The previous prime is 6485775833. The next prime is 6485775883. The reversal of 6485775845 is 5485775846.

6485775845 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5485775846 = 2 ⋅2742887923.

It can be written as a sum of positive squares in 2 ways, for example, as 2654413441 + 3831362404 = 51521^2 + 61898^2 .

It is a cyclic number.

It is not a de Polignac number, because 6485775845 - 2¹⁰ = 6485774821 is a prime.

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, 648577580 + ... + 648577589.

It is an arithmetic number, because the mean of its divisors is an integer number (1945732755).

Almost surely, 2^6485775845 is an apocalyptic number.

It is an amenable number.

6485775845 is a deficient number, since it is larger than the sum of its proper divisors (1297155175).

6485775845 is a wasteful number, since it uses less digits than its factorization.

6485775845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297155174.

The product of its digits is 37632000, while the sum is 59.

The square root of 6485775845 is about 80534.3147049753. The cubic root of 6485775845 is about 1864.8932555398.

Subtracting from 6485775845 its reverse (5485775846), we obtain a palindrome (999999999).

The spelling of 6485775845 in words is "six billion, four hundred eighty-five million, seven hundred seventy-five thousand, eight hundred forty-five".