196689589009 has 27 divisors (see below), whose sum is σ = 209356755699. Its totient is φ = 184778590080.

The previous prime is 196689588961. The next prime is 196689589037. The reversal of 196689589009 is 900985986691.

The square root of 196689589009 is 443497.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 180680254225 + 16009334784 = 425065^2 + 126528^2 .

It is not a de Polignac number, because 196689589009 - 2⁷ = 196689588881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196689589039) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 527317747 + ... + 527318119.

Almost surely, 2^196689589009 is an apocalyptic number.

196689589009 is the 443497-th square number.

196689589009 is the 221749-th centered octagonal number.

It is an amenable number.

196689589009 is a deficient number, since it is larger than the sum of its proper divisors (12667166690).

196689589009 is an frugal number, since it uses more digits than its factorization.

196689589009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 75582720, while the sum is 70.

The spelling of 196689589009 in words is "one hundred ninety-six billion, six hundred eighty-nine million, five hundred eighty-nine thousand, nine".