168422989656 has 32 divisors (see below), whose sum is σ = 424130894640. Its totient is φ = 55731207168.

The previous prime is 168422989639. The next prime is 168422989661. The reversal of 168422989656 is 656989224861.

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, 25608481 + ... + 25615056.

Almost surely, 2^168422989656 is an apocalyptic number.

It is an amenable number.

168422989656 is an abundant number, since it is smaller than the sum of its proper divisors (255707904984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168422989656 is a wasteful number, since it uses less digits than its factorization.

168422989656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51223683 (or 51223679 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 66.

The spelling of 168422989656 in words is "one hundred sixty-eight billion, four hundred twenty-two million, nine hundred eighty-nine thousand, six hundred fifty-six".