180985619029 has 4 divisors (see below), whose sum is σ = 185877122284. Its totient is φ = 176094115776.

The previous prime is 180985619027. The next prime is 180985619033. The reversal of 180985619029 is 920916589081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920916589081 = 33377 ⋅27591353.

It can be written as a sum of positive squares in 2 ways, for example, as 117307620004 + 63677999025 = 342502^2 + 252345^2 .

It is a cyclic number.

It is not a de Polignac number, because 180985619029 - 2¹ = 180985619027 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 (180985619027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2445751572 + ... + 2445751645.

It is an arithmetic number, because the mean of its divisors is an integer number (46469280571).

Almost surely, 2^180985619029 is an apocalyptic number.

It is an amenable number.

180985619029 is a deficient number, since it is larger than the sum of its proper divisors (4891503255).

180985619029 is an equidigital number, since it uses as much as digits as its factorization.

180985619029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891503254.

The product of its (nonzero) digits is 2799360, while the sum is 58.

The spelling of 180985619029 in words is "one hundred eighty billion, nine hundred eighty-five million, six hundred nineteen thousand, twenty-nine".