6442662872 has 8 divisors (see below), whose sum is σ = 12079992900. Its totient is φ = 3221331432.

The previous prime is 6442662859. The next prime is 6442662887. The reversal of 6442662872 is 2782662446.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402666422 + ... + 402666437.

Almost surely, 2^6442662872 is an apocalyptic number.

It is an amenable number.

6442662872 is a deficient number, since it is larger than the sum of its proper divisors (5637330028).

6442662872 is a wasteful number, since it uses less digits than its factorization.

6442662872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805332865 (or 805332861 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 47.

The square root of 6442662872 is about 80266.2000595518. The cubic root of 6442662872 is about 1860.7518901014.

The spelling of 6442662872 in words is "six billion, four hundred forty-two million, six hundred sixty-two thousand, eight hundred seventy-two".