180639217487 has 16 divisors (see below), whose sum is σ = 182286209280. Its totient is φ = 179000036352.

The previous prime is 180639217471. The next prime is 180639217511. The reversal of 180639217487 is 784712936081.

It is a cyclic number.

It is not a de Polignac number, because 180639217487 - 2⁴ = 180639217471 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180639217387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123809564 + ... + 123811022.

It is an arithmetic number, because the mean of its divisors is an integer number (11392888080).

Almost surely, 2^180639217487 is an apocalyptic number.

180639217487 is a deficient number, since it is larger than the sum of its proper divisors (1646991793).

180639217487 is a wasteful number, since it uses less digits than its factorization.

180639217487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 180639217487 in words is "one hundred eighty billion, six hundred thirty-nine million, two hundred seventeen thousand, four hundred eighty-seven".