6464089633 has 4 divisors (see below), whose sum is σ = 6480707220. Its totient is φ = 6447472048.

The previous prime is 6464089631. The next prime is 6464089649. The reversal of 6464089633 is 3369804646.

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 1684856209 + 4779233424 = 41047^2 + 69132^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464089633 - 2¹ = 6464089631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464089631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8308210 + ... + 8308987.

It is an arithmetic number, because the mean of its divisors is an integer number (1620176805).

Almost surely, 2^6464089633 is an apocalyptic number.

It is an amenable number.

6464089633 is a deficient number, since it is larger than the sum of its proper divisors (16617587).

6464089633 is a wasteful number, since it uses less digits than its factorization.

6464089633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16617586.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The square root of 6464089633 is about 80399.5623930877. The cubic root of 6464089633 is about 1862.8124132660.

The spelling of 6464089633 in words is "six billion, four hundred sixty-four million, eighty-nine thousand, six hundred thirty-three".