6442603646 has 16 divisors (see below), whose sum is σ = 10092829824. Its totient is φ = 3078570264.

The previous prime is 6442603639. The next prime is 6442603649. The reversal of 6442603646 is 6463062446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442603649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6716 + ... + 113711.

It is an arithmetic number, because the mean of its divisors is an integer number (630801864).

Almost surely, 2^6442603646 is an apocalyptic number.

6442603646 is a deficient number, since it is larger than the sum of its proper divisors (3650226178).

6442603646 is a wasteful number, since it uses less digits than its factorization.

6442603646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121615.

The product of its (nonzero) digits is 497664, while the sum is 41.

The square root of 6442603646 is about 80265.8311238350. The cubic root of 6442603646 is about 1860.7461882547.

The spelling of 6442603646 in words is "six billion, four hundred forty-two million, six hundred three thousand, six hundred forty-six".