17981144579 has 8 divisors (see below), whose sum is σ = 19481623920. Its totient is φ = 16529861376.

The previous prime is 17981144563. The next prime is 17981144581. The reversal of 17981144579 is 97544118971.

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 17981144579 - 2⁴ = 17981144563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17981144509) 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, 12298274 + ... + 12299735.

It is an arithmetic number, because the mean of its divisors is an integer number (2435202990).

Almost surely, 2^17981144579 is an apocalyptic number.

17981144579 is a deficient number, since it is larger than the sum of its proper divisors (1500479341).

17981144579 is a wasteful number, since it uses less digits than its factorization.

17981144579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24598069.

The product of its digits is 2540160, while the sum is 56.

The spelling of 17981144579 in words is "seventeen billion, nine hundred eighty-one million, one hundred forty-four thousand, five hundred seventy-nine".