180991140617 has 8 divisors (see below), whose sum is σ = 206857968576. Its totient is φ = 155127050352.

The previous prime is 180991140607. The next prime is 180991140623. The reversal of 180991140617 is 716041199081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 180991140617 - 2²² = 180986946313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180991140607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540743 + ... + 808940.

It is an arithmetic number, because the mean of its divisors is an integer number (25857246072).

Almost surely, 2^180991140617 is an apocalyptic number.

It is an amenable number.

180991140617 is a deficient number, since it is larger than the sum of its proper divisors (25866827959).

180991140617 is a wasteful number, since it uses less digits than its factorization.

180991140617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368847.

The product of its (nonzero) digits is 108864, while the sum is 47.

The spelling of 180991140617 in words is "one hundred eighty billion, nine hundred ninety-one million, one hundred forty thousand, six hundred seventeen".