11164509 has 12 divisors (see below), whose sum is σ = 16164252. Its totient is φ = 7425600.

The previous prime is 11164501. The next prime is 11164519. The reversal of 11164509 is 90546111.

11164509 is a `hidden beast` number, since 1 + 11 + 645 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 956484 + 10208025 = 978^2 + 3195^2 .

It is not a de Polignac number, because 11164509 - 2³ = 11164501 is a prime.

It is a super-2 number, since 2×11164509² = 249292522422162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11164501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3499 + ... + 5879.

It is an arithmetic number, because the mean of its divisors is an integer number (1347021).

Almost surely, 2^11164509 is an apocalyptic number.

It is an amenable number.

11164509 is a deficient number, since it is larger than the sum of its proper divisors (4999743).

11164509 is a wasteful number, since it uses less digits than its factorization.

11164509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 11164509 is about 3341.3334164671. Note that the first 3 decimals coincide. The cubic root of 11164509 is about 223.5012086477.

It can be divided in two parts, 1116 and 4509, that added together give a square (5625 = 75²).

The spelling of 11164509 in words is "eleven million, one hundred sixty-four thousand, five hundred nine".