19782117093166 has 8 divisors (see below), whose sum is σ = 29674674268704. Its totient is φ = 9890559003600.

The previous prime is 19782117093161. The next prime is 19782117093181. The reversal of 19782117093166 is 66139071128791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19782117093161) 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, 249721990 + ... + 249801193.

It is an arithmetic number, because the mean of its divisors is an integer number (3709334283588).

Almost surely, 2^{19782117093166} is an apocalyptic number.

19782117093166 is a deficient number, since it is larger than the sum of its proper divisors (9892557175538).

19782117093166 is a wasteful number, since it uses less digits than its factorization.

19782117093166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499542986.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 19782117093166 in words is "nineteen trillion, seven hundred eighty-two billion, one hundred seventeen million, ninety-three thousand, one hundred sixty-six".