10899986409 has 27 divisors (see below), whose sum is σ = 17055067653. Its totient is φ = 6705178272.

The previous prime is 10899986387. The next prime is 10899986417. The reversal of 10899986409 is 90468999801.

The square root of 10899986409 is 104403.

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

10899986409 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 8099460009 + 2800526400 = 89997^2 + 52920^2 .

It is not a de Polignac number, because 10899986409 - 2¹³ = 10899978217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10899986809) 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 26 ways as a sum of consecutive naturals, for example, 4070379 + ... + 4073055.

Almost surely, 2^10899986409 is an apocalyptic number.

10899986409 is the 104403-rd square number.

10899986409 is the 52202-nd centered octagonal number.

It is an amenable number.

10899986409 is a deficient number, since it is larger than the sum of its proper divisors (6155081244).

10899986409 is an frugal number, since it uses more digits than its factorization.

10899986409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The spelling of 10899986409 in words is "ten billion, eight hundred ninety-nine million, nine hundred eighty-six thousand, four hundred nine".