18725338163166 has 16 divisors (see below), whose sum is σ = 37458216284544. Its totient is φ = 6240522728024.

The previous prime is 18725338163149. The next prime is 18725338163201. The reversal of 18725338163166 is 66136183352781.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314132640 + ... + 314192243.

It is an arithmetic number, because the mean of its divisors is an integer number (2341138517784).

Almost surely, 2^{18725338163166} is an apocalyptic number.

18725338163166 is an abundant number, since it is smaller than the sum of its proper divisors (18732878121378).

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

18725338163166 is a wasteful number, since it uses less digits than its factorization.

18725338163166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628329855.

The product of its digits is 26127360, while the sum is 60.

The spelling of 18725338163166 in words is "eighteen trillion, seven hundred twenty-five billion, three hundred thirty-eight million, one hundred sixty-three thousand, one hundred sixty-six".