180728477279 has 12 divisors (see below), whose sum is σ = 211053217824. Its totient is φ = 154307349504.

The previous prime is 180728477273. The next prime is 180728477323. The reversal of 180728477279 is 972774827081.

It is not a de Polignac number, because 180728477279 - 2²⁴ = 180711700063 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 (180728477273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7163159 + ... + 7188344.

It is an arithmetic number, because the mean of its divisors is an integer number (17587768152).

Almost surely, 2^180728477279 is an apocalyptic number.

180728477279 is a deficient number, since it is larger than the sum of its proper divisors (30324740545).

180728477279 is a wasteful number, since it uses less digits than its factorization.

180728477279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14351774 (or 14351767 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 62.

The spelling of 180728477279 in words is "one hundred eighty billion, seven hundred twenty-eight million, four hundred seventy-seven thousand, two hundred seventy-nine".