168857167275990 has 64 divisors (see below), whose sum is σ = 450291418557120. Its totient is φ = 45028014024960.

The previous prime is 168857167275967. The next prime is 168857167275991. The reversal of 168857167275990 is 99572761758861.

It is a happy number.

168857167275990 is a `hidden beast` number, since 1 + 6 + 8 + 8 + 5 + 7 + 16 + 7 + 2 + 7 + 599 + 0 = 666.

168857167275990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168857167275991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17908132 + ... + 25659608.

It is an arithmetic number, because the mean of its divisors is an integer number (7035803414955).

Almost surely, 2^{168857167275990} is an apocalyptic number.

168857167275990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168857167275990 is an abundant number, since it is smaller than the sum of its proper divisors (281434251281130).

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

168857167275990 is a wasteful number, since it uses less digits than its factorization.

168857167275990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832174 (or 7832168 counting only the distinct ones).

The product of its (nonzero) digits is 3200601600, while the sum is 81.

The spelling of 168857167275990 in words is "one hundred sixty-eight trillion, eight hundred fifty-seven billion, one hundred sixty-seven million, two hundred seventy-five thousand, nine hundred ninety".