6641564362 has 4 divisors (see below), whose sum is σ = 9962346546. Its totient is φ = 3320782180.

The previous prime is 6641564359. The next prime is 6641564381. The reversal of 6641564362 is 2634651466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6166803841 + 474760521 = 78529^2 + 21789^2 .

It is a super-2 number, since 2×6641564362² = 88220754349176934088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660391089 + ... + 1660391092.

Almost surely, 2^6641564362 is an apocalyptic number.

6641564362 is a deficient number, since it is larger than the sum of its proper divisors (3320782184).

6641564362 is a wasteful number, since it uses less digits than its factorization.

6641564362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320782183.

The product of its digits is 622080, while the sum is 43.

The square root of 6641564362 is about 81495.7935233470. The cubic root of 6641564362 is about 1879.7068693795.

The spelling of 6641564362 in words is "six billion, six hundred forty-one million, five hundred sixty-four thousand, three hundred sixty-two".