646442602 has 16 divisors (see below), whose sum is σ = 1044675072. Its totient is φ = 298237680.

The previous prime is 646442591. The next prime is 646442611. The reversal of 646442602 is 206244646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112827 + ... + 118417.

It is an arithmetic number, because the mean of its divisors is an integer number (65292192).

Almost surely, 2^646442602 is an apocalyptic number.

646442602 is a deficient number, since it is larger than the sum of its proper divisors (398232470).

646442602 is a wasteful number, since it uses less digits than its factorization.

646442602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10053.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 646442602 is about 25425.2355347989. The cubic root of 646442602 is about 864.6559278425.

The spelling of 646442602 in words is "six hundred forty-six million, four hundred forty-two thousand, six hundred two".