168786997133 has 16 divisors (see below), whose sum is σ = 178261066752. Its totient is φ = 159600240000.

The previous prime is 168786997123. The next prime is 168786997177. The reversal of 168786997133 is 331799687861.

It is a cyclic number.

It is not a de Polignac number, because 168786997133 - 2⁴ = 168786997117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168786997103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10016 + ... + 581097.

It is an arithmetic number, because the mean of its divisors is an integer number (11141316672).

Almost surely, 2^168786997133 is an apocalyptic number.

It is an amenable number.

168786997133 is a deficient number, since it is larger than the sum of its proper divisors (9474069619).

168786997133 is a wasteful number, since it uses less digits than its factorization.

168786997133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591356.

The product of its digits is 82301184, while the sum is 68.

The spelling of 168786997133 in words is "one hundred sixty-eight billion, seven hundred eighty-six million, nine hundred ninety-seven thousand, one hundred thirty-three".