8957721069168 has 40 divisors (see below), whose sum is σ = 23140890364416. Its totient is φ = 2985892708800.

The previous prime is 8957721069163. The next prime is 8957721069223. The reversal of 8957721069168 is 8619601277598.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8957721069163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15617383 + ... + 16180793.

Almost surely, 2^{8957721069168} is an apocalyptic number.

It is an amenable number.

8957721069168 is an abundant number, since it is smaller than the sum of its proper divisors (14183169295248).

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

8957721069168 is a wasteful number, since it uses less digits than its factorization.

8957721069168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894653 (or 894647 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 69.

The spelling of 8957721069168 in words is "eight trillion, nine hundred fifty-seven billion, seven hundred twenty-one million, sixty-nine thousand, one hundred sixty-eight".