17111689992 has 80 divisors (see below), whose sum is σ = 48234140460. Its totient is φ = 5667532416.

The previous prime is 17111689967. The next prime is 17111690003. The reversal of 17111689992 is 29998611171.

It can be written as a sum of positive squares in 2 ways, for example, as 17016158916 + 95531076 = 130446^2 + 9774^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17638 + ... + 185834.

Almost surely, 2^17111689992 is an apocalyptic number.

17111689992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17111689992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24117070230).

17111689992 is an abundant number, since it is smaller than the sum of its proper divisors (31122450468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17111689992 is a wasteful number, since it uses less digits than its factorization.

17111689992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168372 (or 168359 counting only the distinct ones).

The product of its digits is 489888, while the sum is 54.

The spelling of 17111689992 in words is "seventeen billion, one hundred eleven million, six hundred eighty-nine thousand, nine hundred ninety-two".