6442626164 has 12 divisors (see below), whose sum is σ = 12141872484. Its totient is φ = 2973519744.

The previous prime is 6442626149. The next prime is 6442626241. The reversal of 6442626164 is 4616262446.

It can be written as a sum of positive squares in 2 ways, for example, as 3742992400 + 2699633764 = 61180^2 + 51958^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61948277 + ... + 61948380.

It is an arithmetic number, because the mean of its divisors is an integer number (1011822707).

Almost surely, 2^6442626164 is an apocalyptic number.

It is an amenable number.

6442626164 is a deficient number, since it is larger than the sum of its proper divisors (5699246320).

6442626164 is a wasteful number, since it uses less digits than its factorization.

6442626164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123896674 (or 123896672 counting only the distinct ones).

The product of its digits is 331776, while the sum is 41.

The square root of 6442626164 is about 80265.9713951062. The cubic root of 6442626164 is about 1860.7483561274.

The spelling of 6442626164 in words is "six billion, four hundred forty-two million, six hundred twenty-six thousand, one hundred sixty-four".