643106602 has 8 divisors (see below), whose sum is σ = 979058016. Its totient is φ = 316753932.

The previous prime is 643106599. The next prime is 643106609. The reversal of 643106602 is 206601346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×643106602² = 827172203071972808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643106609) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2399518 + ... + 2399785.

It is an arithmetic number, because the mean of its divisors is an integer number (122382252).

Almost surely, 2^643106602 is an apocalyptic number.

643106602 is a deficient number, since it is larger than the sum of its proper divisors (335951414).

643106602 is a wasteful number, since it uses less digits than its factorization.

643106602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799372.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 643106602 is about 25359.5465653469. The cubic root of 643106602 is about 863.1659949404.

Adding to 643106602 its reverse (206601346), we get a palindrome (849707948).

The spelling of 643106602 in words is "six hundred forty-three million, one hundred six thousand, six hundred two".