17137298978 has 6 divisors (see below), whose sum is σ = 25706226171. Its totient is φ = 8568556922.

The previous prime is 17137298963. The next prime is 17137298989. The reversal of 17137298978 is 87989273171.

It can be written as a sum of positive squares in only one way, i.e., 8568649489 + 8568649489 = 92567^2 + 92567^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=92567.

It is a super-2 number, since 2×17137298978² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17137298978.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 138851 + ... + 231417.

Almost surely, 2^17137298978 is an apocalyptic number.

17137298978 is a deficient number, since it is larger than the sum of its proper divisors (8568927193).

17137298978 is an frugal number, since it uses more digits than its factorization.

17137298978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185136 (or 92569 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 62.

The spelling of 17137298978 in words is "seventeen billion, one hundred thirty-seven million, two hundred ninety-eight thousand, nine hundred seventy-eight".