168866271780 has 48 divisors (see below), whose sum is σ = 472848062400. Its totient is φ = 45028862848.

The previous prime is 168866271737. The next prime is 168866271829. The reversal of 168866271780 is 87172668861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512022 + ... + 1619858.

It is an arithmetic number, because the mean of its divisors is an integer number (9851001300).

Almost surely, 2^168866271780 is an apocalyptic number.

168866271780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168866271780 is an abundant number, since it is smaller than the sum of its proper divisors (303981790620).

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

168866271780 is a wasteful number, since it uses less digits than its factorization.

168866271780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133948 (or 133946 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 168866271780 in words is "one hundred sixty-eight billion, eight hundred sixty-six million, two hundred seventy-one thousand, seven hundred eighty".