17187987979090 has 16 divisors (see below), whose sum is σ = 30942470335320. Its totient is φ = 6874285864320.

The previous prime is 17187987979037. The next prime is 17187987979133. The reversal of 17187987979090 is 9097978978171.

It can be written as a sum of positive squares in 4 ways, for example, as 16323547338081 + 864440641009 = 4040241^2 + 929753^2 .

It is a super-3 number, since 3×17187987979090³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17187987978995 and 17187987979013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113586525 + ... + 113737744.

Almost surely, 2^{17187987979090} is an apocalyptic number.

17187987979090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17187987979090 is a deficient number, since it is larger than the sum of its proper divisors (13754482356230).

17187987979090 is a wasteful number, since it uses less digits than its factorization.

17187987979090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227331837.

The product of its (nonzero) digits is 1008189504, while the sum is 82.

The spelling of 17187987979090 in words is "seventeen trillion, one hundred eighty-seven billion, nine hundred eighty-seven million, nine hundred seventy-nine thousand, ninety".