180540246221 has 4 divisors (see below), whose sum is σ = 180683647200. Its totient is φ = 180396845244.

The previous prime is 180540246203. The next prime is 180540246223. The reversal of 180540246221 is 122642045081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180540246221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180540246223) 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, 71698601 + ... + 71701118.

It is an arithmetic number, because the mean of its divisors is an integer number (45170911800).

Almost surely, 2^180540246221 is an apocalyptic number.

It is an amenable number.

180540246221 is a deficient number, since it is larger than the sum of its proper divisors (143400979).

180540246221 is a wasteful number, since it uses less digits than its factorization.

180540246221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143400978.

The product of its (nonzero) digits is 30720, while the sum is 35.

The spelling of 180540246221 in words is "one hundred eighty billion, five hundred forty million, two hundred forty-six thousand, two hundred twenty-one".