646432621443662 has 8 divisors (see below), whose sum is σ = 969659300472456. Its totient is φ = 323212854619512.

The previous prime is 646432621443611. The next prime is 646432621443671. The reversal of 646432621443662 is 266344126234646.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727817353 + ... + 1728191444.

It is an arithmetic number, because the mean of its divisors is an integer number (121207412559057).

Almost surely, 2^{646432621443662} is an apocalyptic number.

646432621443662 is a deficient number, since it is larger than the sum of its proper divisors (323226679028794).

646432621443662 is a wasteful number, since it uses less digits than its factorization.

646432621443662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456102322.

The product of its digits is 143327232, while the sum is 59.

The spelling of 646432621443662 in words is "six hundred forty-six trillion, four hundred thirty-two billion, six hundred twenty-one million, four hundred forty-three thousand, six hundred sixty-two".