646103563156 has 12 divisors (see below), whose sum is σ = 1131557062720. Its totient is φ = 322801545240.

The previous prime is 646103563153. The next prime is 646103563241. The reversal of 646103563156 is 651365301646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646103563153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62553276 + ... + 62563603.

Almost surely, 2^646103563156 is an apocalyptic number.

It is an amenable number.

646103563156 is a deficient number, since it is larger than the sum of its proper divisors (485453499564).

646103563156 is a wasteful number, since it uses less digits than its factorization.

646103563156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125118174 (or 125118172 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 646103563156 in words is "six hundred forty-six billion, one hundred three million, five hundred sixty-three thousand, one hundred fifty-six".