180561580478 has 16 divisors (see below), whose sum is σ = 272087362176. Its totient is φ = 89865884160.

The previous prime is 180561580417. The next prime is 180561580481. The reversal of 180561580478 is 874085165081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5442950 + ... + 5476022.

It is an arithmetic number, because the mean of its divisors is an integer number (17005460136).

Almost surely, 2^180561580478 is an apocalyptic number.

180561580478 is a deficient number, since it is larger than the sum of its proper divisors (91525781698).

180561580478 is a wasteful number, since it uses less digits than its factorization.

180561580478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45539.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 180561580478 in words is "one hundred eighty billion, five hundred sixty-one million, five hundred eighty thousand, four hundred seventy-eight".