18872661164506 has 8 divisors (see below), whose sum is σ = 28731514011840. Its totient is φ = 9295489827228.

The previous prime is 18872661164503. The next prime is 18872661164527. The reversal of 18872661164506 is 60546116627881.

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

It is not an unprimeable number, because it can be changed into a prime (18872661164503) 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, 70420377346 + ... + 70420377613.

It is an arithmetic number, because the mean of its divisors is an integer number (3591439251480).

Almost surely, 2^{18872661164506} is an apocalyptic number.

18872661164506 is a deficient number, since it is larger than the sum of its proper divisors (9858852847334).

18872661164506 is a wasteful number, since it uses less digits than its factorization.

18872661164506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140840755028.

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 18872661164506 in words is "eighteen trillion, eight hundred seventy-two billion, six hundred sixty-one million, one hundred sixty-four thousand, five hundred six".