6464641 has 6 divisors (see below), whose sum is σ = 6867590. Its totient is φ = 6084096.

The previous prime is 6464639. The next prime is 6464687. The reversal of 6464641 is 1464646.

It can be written as a sum of positive squares in 3 ways, for example, as 2480625 + 3984016 = 1575^2 + 1996^2 .

It is not a de Polignac number, because 6464641 - 2¹ = 6464639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10896 + ... + 11473.

Almost surely, 2^6464641 is an apocalyptic number.

It is an amenable number.

6464641 is a deficient number, since it is larger than the sum of its proper divisors (402949).

6464641 is a wasteful number, since it uses less digits than its factorization.

6464641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22403 (or 22386 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 6464641 is about 2542.5658300229. The cubic root of 6464641 is about 186.2865375820.

The spelling of 6464641 in words is "six million, four hundred sixty-four thousand, six hundred forty-one".