180017872221 has 8 divisors (see below), whose sum is σ = 261844177824. Its totient is φ = 109101740720.

The previous prime is 180017872141. The next prime is 180017872291. The reversal of 180017872221 is 122278710081.

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

It is a cyclic number.

It is not a de Polignac number, because 180017872221 - 2¹⁴ = 180017855837 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 180017872221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180017872291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727543486 + ... + 2727543551.

It is an arithmetic number, because the mean of its divisors is an integer number (32730522228).

Almost surely, 2^180017872221 is an apocalyptic number.

180017872221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

180017872221 is a deficient number, since it is larger than the sum of its proper divisors (81826305603).

180017872221 is a wasteful number, since it uses less digits than its factorization.

180017872221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455087051.

The product of its (nonzero) digits is 25088, while the sum is 39.

The spelling of 180017872221 in words is "one hundred eighty billion, seventeen million, eight hundred seventy-two thousand, two hundred twenty-one".