180939673645 has 8 divisors (see below), whose sum is σ = 217132617240. Its totient is φ = 144748399680.

The previous prime is 180939673643. The next prime is 180939673657. The reversal of 180939673645 is 546376939081.

It can be written as a sum of positive squares in 4 ways, for example, as 59472089161 + 121467584484 = 243869^2 + 348522^2 .

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

It is not a de Polignac number, because 180939673645 - 2¹ = 180939673643 is a prime.

It is a super-3 number, since 3×180939673645³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180939673643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165126 + ... + 623815.

It is an arithmetic number, because the mean of its divisors is an integer number (27141577155).

Almost surely, 2^180939673645 is an apocalyptic number.

It is an amenable number.

180939673645 is a deficient number, since it is larger than the sum of its proper divisors (36192943595).

180939673645 is an equidigital number, since it uses as much as digits as its factorization.

180939673645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834815.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 180939673645 in words is "one hundred eighty billion, nine hundred thirty-nine million, six hundred seventy-three thousand, six hundred forty-five".