180057991521 has 16 divisors (see below), whose sum is σ = 251490259584. Its totient is φ = 114372808704.

The previous prime is 180057991513. The next prime is 180057991577. The reversal of 180057991521 is 125199750081.

180057991521 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 180057991521 - 2³ = 180057991513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180057991501) 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, 5059186 + ... + 5094651.

It is an arithmetic number, because the mean of its divisors is an integer number (15718141224).

Almost surely, 2^180057991521 is an apocalyptic number.

It is an amenable number.

180057991521 is a deficient number, since it is larger than the sum of its proper divisors (71432268063).

180057991521 is a wasteful number, since it uses less digits than its factorization.

180057991521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154120.

The product of its (nonzero) digits is 226800, while the sum is 48.

The spelling of 180057991521 in words is "one hundred eighty billion, fifty-seven million, nine hundred ninety-one thousand, five hundred twenty-one".