17979616289 has 4 divisors (see below), whose sum is σ = 18196238256. Its totient is φ = 17762994324.

The previous prime is 17979616261. The next prime is 17979616321. The reversal of 17979616289 is 98261697971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 17979616289 - 2⁸ = 17979616033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17979616219) 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, 108310859 + ... + 108311024.

It is an arithmetic number, because the mean of its divisors is an integer number (4549059564).

Almost surely, 2^17979616289 is an apocalyptic number.

It is an amenable number.

17979616289 is a deficient number, since it is larger than the sum of its proper divisors (216621967).

17979616289 is an equidigital number, since it uses as much as digits as its factorization.

17979616289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216621966.

The product of its digits is 20575296, while the sum is 65.

The spelling of 17979616289 in words is "seventeen billion, nine hundred seventy-nine million, six hundred sixteen thousand, two hundred eighty-nine".