180518478613 has 6 divisors (see below), whose sum is σ = 198421137782. Its totient is φ = 164107707720.

The previous prime is 180518478611. The next prime is 180518478619. The reversal of 180518478613 is 316874815081.

180518478613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 175847712964 + 4670765649 = 419342^2 + 68343^2 .

It is not a de Polignac number, because 180518478613 - 2¹ = 180518478611 is a prime.

It is a super-2 number, since 2×180518478613² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180518478611) 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 5 ways as a sum of consecutive naturals, for example, 745944006 + ... + 745944247.

Almost surely, 2^180518478613 is an apocalyptic number.

It is an amenable number.

180518478613 is a deficient number, since it is larger than the sum of its proper divisors (17902659169).

180518478613 is a wasteful number, since it uses less digits than its factorization.

180518478613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491888275 (or 1491888264 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 180518478613 in words is "one hundred eighty billion, five hundred eighteen million, four hundred seventy-eight thousand, six hundred thirteen".