6464895 has 16 divisors (see below), whose sum is σ = 10678272. Its totient is φ = 3336480.

The previous prime is 6464891. The next prime is 6464917. The reversal of 6464895 is 5984646.

It is not a de Polignac number, because 6464895 - 2² = 6464891 is a prime.

It is a super-2 number, since 2×6464895² = 83589734722050, which contains 22 as substring.

6464895 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6487 + ... + 7416.

It is an arithmetic number, because the mean of its divisors is an integer number (667392).

Almost surely, 2^6464895 is an apocalyptic number.

6464895 is a deficient number, since it is larger than the sum of its proper divisors (4213377).

6464895 is a wasteful number, since it uses less digits than its factorization.

6464895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13942.

The product of its digits is 207360, while the sum is 42.

The square root of 6464895 is about 2542.6157790748. The cubic root of 6464895 is about 186.2889773236.

Subtracting from 6464895 its reverse (5984646), we obtain a square (480249 = 693²).

The spelling of 6464895 in words is "six million, four hundred sixty-four thousand, eight hundred ninety-five".