6464886245 has 4 divisors (see below), whose sum is σ = 7757863500. Its totient is φ = 5171908992.

The previous prime is 6464886229. The next prime is 6464886251. The reversal of 6464886245 is 5426884646.

It is a happy number.

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 3574963681 + 2889922564 = 59791^2 + 53758^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464886245 - 2⁴ = 6464886229 is a prime.

It is a magnanimous 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, 646488620 + ... + 646488629.

It is an arithmetic number, because the mean of its divisors is an integer number (1939465875).

Almost surely, 2^6464886245 is an apocalyptic number.

It is an amenable number.

6464886245 is a deficient number, since it is larger than the sum of its proper divisors (1292977255).

6464886245 is a wasteful number, since it uses less digits than its factorization.

6464886245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292977254.

The product of its digits is 8847360, while the sum is 53.

The square root of 6464886245 is about 80404.5163221569. The cubic root of 6464886245 is about 1862.8889323044. Note that the first 3 decimals are identical.

The spelling of 6464886245 in words is "six billion, four hundred sixty-four million, eight hundred eighty-six thousand, two hundred forty-five".