11342889009 has 27 divisors (see below), whose sum is σ = 16571345817. Its totient is φ = 7476510600.

The previous prime is 11342888981. The next prime is 11342889011. The reversal of 11342889009 is 90098824311.

The square root of 11342889009 is 106503.

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

It is not a de Polignac number, because 11342889009 - 2¹⁵ = 11342856241 is a prime.

It is a super-2 number, since 2×11342889009² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11342889029) 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, 41855544 + ... + 41855814.

Almost surely, 2^11342889009 is an apocalyptic number.

11342889009 is the 106503-rd square number.

11342889009 is the 53252-nd centered octagonal number.

It is an amenable number.

11342889009 is a deficient number, since it is larger than the sum of its proper divisors (5228456808).

11342889009 is an frugal number, since it uses more digits than its factorization.

11342889009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 11342889009 in words is "eleven billion, three hundred forty-two million, eight hundred eighty-nine thousand, nine".