11989593009 has 81 divisors (see below), whose sum is σ = 19589516193. Its totient is φ = 7063870464.

The previous prime is 11989592957. The next prime is 11989593023. The reversal of 11989593009 is 90039598911.

The square root of 11989593009 is 109497.

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

11989593009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1462833009 + 10526760000 = 38247^2 + 102600^2 .

It is not a de Polignac number, because 11989593009 - 2⁹ = 11989592497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11989592009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 106102537 + ... + 106102649.

Almost surely, 2^11989593009 is an apocalyptic number.

11989593009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11989593009 is the 109497-th square number.

11989593009 is the 54749-th centered octagonal number.

It is an amenable number.

11989593009 is a deficient number, since it is larger than the sum of its proper divisors (7599923184).

11989593009 is a wasteful number, since it uses less digits than its factorization.

11989593009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The spelling of 11989593009 in words is "eleven billion, nine hundred eighty-nine million, five hundred ninety-three thousand, nine".