646173643102 has 16 divisors (see below), whose sum is σ = 1043963182080. Its totient is φ = 298192783392.

The previous prime is 646173643079. The next prime is 646173643121. The reversal of 646173643102 is 201346371646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524702 + ... + 1901857.

It is an arithmetic number, because the mean of its divisors is an integer number (65247698880).

Almost surely, 2^646173643102 is an apocalyptic number.

646173643102 is a deficient number, since it is larger than the sum of its proper divisors (397789538978).

646173643102 is a wasteful number, since it uses less digits than its factorization.

646173643102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433827.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 646173643102 in words is "six hundred forty-six billion, one hundred seventy-three million, six hundred forty-three thousand, one hundred two".