168961681768 has 32 divisors (see below), whose sum is σ = 345975624000. Its totient is φ = 76718056960.

The previous prime is 168961681741. The next prime is 168961681829. The reversal of 168961681768 is 867186169861.

It is a happy 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, 951628 + ... + 1115131.

It is an arithmetic number, because the mean of its divisors is an integer number (10811738250).

Almost surely, 2^168961681768 is an apocalyptic number.

It is an amenable number.

168961681768 is an abundant number, since it is smaller than the sum of its proper divisors (177013942232).

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

168961681768 is a wasteful number, since it uses less digits than its factorization.

168961681768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067705 (or 2067701 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 67.

The spelling of 168961681768 in words is "one hundred sixty-eight billion, nine hundred sixty-one million, six hundred eighty-one thousand, seven hundred sixty-eight".