180871806487 has 4 divisors (see below), whose sum is σ = 180889705216. Its totient is φ = 180853907760.

The previous prime is 180871806481. The next prime is 180871806491. The reversal of 180871806487 is 784608178081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 180871806487 - 2¹⁹ = 180871282199 is a prime.

It is a super-2 number, since 2×180871806487² (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 (180871806481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8934198 + ... + 8954419.

It is an arithmetic number, because the mean of its divisors is an integer number (45222426304).

Almost surely, 2^180871806487 is an apocalyptic number.

180871806487 is a deficient number, since it is larger than the sum of its proper divisors (17898729).

180871806487 is a wasteful number, since it uses less digits than its factorization.

180871806487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17898728.

The product of its (nonzero) digits is 4816896, while the sum is 58.

The spelling of 180871806487 in words is "one hundred eighty billion, eight hundred seventy-one million, eight hundred six thousand, four hundred eighty-seven".