6442517266 has 4 divisors (see below), whose sum is σ = 9663775902. Its totient is φ = 3221258632.

The previous prime is 6442517261. The next prime is 6442517299. The reversal of 6442517266 is 6627152446.

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., 4828165225 + 1614352041 = 69485^2 + 40179^2 .

It is a super-2 number, since 2×6442517266² = 83012057445416229512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6442517261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610629315 + ... + 1610629318.

Almost surely, 2^6442517266 is an apocalyptic number.

6442517266 is a deficient number, since it is larger than the sum of its proper divisors (3221258636).

6442517266 is a wasteful number, since it uses less digits than its factorization.

6442517266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221258635.

The product of its digits is 483840, while the sum is 43.

The square root of 6442517266 is about 80265.2930350348. The cubic root of 6442517266 is about 1860.7378721565.

The spelling of 6442517266 in words is "six billion, four hundred forty-two million, five hundred seventeen thousand, two hundred sixty-six".