6442042402 has 4 divisors (see below), whose sum is σ = 9663063606. Its totient is φ = 3221021200.

The previous prime is 6442042393. The next prime is 6442042417. The reversal of 6442042402 is 2042402446.

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., 5864649561 + 577392841 = 76581^2 + 24029^2 .

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, 1610510599 + ... + 1610510602.

Almost surely, 2^6442042402 is an apocalyptic number.

6442042402 is a deficient number, since it is larger than the sum of its proper divisors (3221021204).

6442042402 is a wasteful number, since it uses less digits than its factorization.

6442042402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221021203.

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 6442042402 is about 80262.3348900342. The cubic root of 6442042402 is about 1860.6921540465.

Adding to 6442042402 its reverse (2042402446), we get a palindrome (8484444848).

The spelling of 6442042402 in words is "six billion, four hundred forty-two million, forty-two thousand, four hundred two".