6464585891 has 8 divisors (see below), whose sum is σ = 6550214160. Its totient is φ = 6379142112.

The previous prime is 6464585887. The next prime is 6464585909. The reversal of 6464585891 is 1985854646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6464585891 - 2² = 6464585887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464585851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25145 + ... + 116453.

It is an arithmetic number, because the mean of its divisors is an integer number (818776770).

Almost surely, 2^6464585891 is an apocalyptic number.

6464585891 is a deficient number, since it is larger than the sum of its proper divisors (85628269).

6464585891 is an equidigital number, since it uses as much as digits as its factorization.

6464585891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92245.

The product of its digits is 8294400, while the sum is 56.

The square root of 6464585891 is about 80402.6485322467. The cubic root of 6464585891 is about 1862.8600823609.

The spelling of 6464585891 in words is "six billion, four hundred sixty-four million, five hundred eighty-five thousand, eight hundred ninety-one".