9170898856 has 16 divisors (see below), whose sum is σ = 19651926240. Its totient is φ = 3930385200.

The previous prime is 9170898851. The next prime is 9170898871. The reversal of 9170898856 is 6588980719.

It is a junction number, because it is equal to n+sod(n) for n = 9170898794 and 9170898803.

It is not an unprimeable number, because it can be changed into a prime (9170898851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81882970 + ... + 81883081.

It is an arithmetic number, because the mean of its divisors is an integer number (1228245390).

Almost surely, 2^9170898856 is an apocalyptic number.

It is an amenable number.

9170898856 is an abundant number, since it is smaller than the sum of its proper divisors (10481027384).

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

9170898856 is a wasteful number, since it uses less digits than its factorization.

9170898856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163766064 (or 163766060 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 61.

The square root of 9170898856 is about 95764.8101131099. The cubic root of 9170898856 is about 2093.1674274735.

The spelling of 9170898856 in words is "nine billion, one hundred seventy million, eight hundred ninety-eight thousand, eight hundred fifty-six".