186073551221 has 16 divisors (see below), whose sum is σ = 198180924480. Its totient is φ = 174096733440.

The previous prime is 186073551197. The next prime is 186073551233. The reversal of 186073551221 is 122155370681.

It is a happy number.

186073551221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 186073551221 - 2²² = 186069356917 is a prime.

It is a super-2 number, since 2×186073551221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186073551281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4194326 + ... + 4238456.

It is an arithmetic number, because the mean of its divisors is an integer number (12386307780).

Almost surely, 2^186073551221 is an apocalyptic number.

It is an amenable number.

186073551221 is a deficient number, since it is larger than the sum of its proper divisors (12107373259).

186073551221 is a wasteful number, since it uses less digits than its factorization.

186073551221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45604.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 186073551221 in words is "one hundred eighty-six billion, seventy-three million, five hundred fifty-one thousand, two hundred twenty-one".