180055427781 has 8 divisors (see below), whose sum is σ = 246562387744. Its totient is φ = 116792709840.

The previous prime is 180055427779. The next prime is 180055427791. The reversal of 180055427781 is 187724550081.

180055427781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 180055427781 - 2¹ = 180055427779 is a prime.

It is a super-2 number, since 2×180055427781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 180055427781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180055427791) 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 7 ways as a sum of consecutive naturals, for example, 811060375 + ... + 811060596.

It is an arithmetic number, because the mean of its divisors is an integer number (30820298468).

Almost surely, 2^180055427781 is an apocalyptic number.

It is an amenable number.

180055427781 is a deficient number, since it is larger than the sum of its proper divisors (66506959963).

180055427781 is a wasteful number, since it uses less digits than its factorization.

180055427781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622121011.

The product of its (nonzero) digits is 627200, while the sum is 48.

The spelling of 180055427781 in words is "one hundred eighty billion, fifty-five million, four hundred twenty-seven thousand, seven hundred eighty-one".