17179971998 has 32 divisors (see below), whose sum is σ = 29744299200. Its totient is φ = 7289720064.

The previous prime is 17179971997. The next prime is 17179972037. The reversal of 17179971998 is 89917997171.

It is a super-2 number, since 2×17179971998² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17179971997) 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, 2451836 + ... + 2458832.

It is an arithmetic number, because the mean of its divisors is an integer number (929509350).

Almost surely, 2^17179971998 is an apocalyptic number.

17179971998 is a deficient number, since it is larger than the sum of its proper divisors (12564327202).

17179971998 is a wasteful number, since it uses less digits than its factorization.

17179971998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8724.

The product of its digits is 18003384, while the sum is 68.

The spelling of 17179971998 in words is "seventeen billion, one hundred seventy-nine million, nine hundred seventy-one thousand, nine hundred ninety-eight".