6464138434 has 8 divisors (see below), whose sum is σ = 10442069820. Its totient is φ = 2983448496.

The previous prime is 6464138419. The next prime is 6464138437. The reversal of 6464138434 is 4348314646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6392482209 + 71656225 = 79953^2 + 8465^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6464138437) 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, 124310329 + ... + 124310380.

Almost surely, 2^6464138434 is an apocalyptic number.

6464138434 is a deficient number, since it is larger than the sum of its proper divisors (3977931386).

6464138434 is a wasteful number, since it uses less digits than its factorization.

6464138434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248620724.

The product of its digits is 663552, while the sum is 43.

The square root of 6464138434 is about 80399.8658829727. The cubic root of 6464138434 is about 1862.8171010558.

The spelling of 6464138434 in words is "six billion, four hundred sixty-four million, one hundred thirty-eight thousand, four hundred thirty-four".