11004639409 has 9 divisors (see below), whose sum is σ = 11506427499. Its totient is φ = 10523868960.

The previous prime is 11004639353. The next prime is 11004639433. The reversal of 11004639409 is 90493640011.

The square root of 11004639409 is 104903.

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

It can be written as a sum of positive squares in only one way, i.e., 3684125809 + 7320513600 = 60697^2 + 85560^2 .

It is not a de Polignac number, because 11004639409 - 2¹⁹ = 11004115121 is a prime.

It is a super-2 number, since 2×11004639409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11004639479) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2410489 + ... + 2415049.

Almost surely, 2^11004639409 is an apocalyptic number.

11004639409 is the 104903-rd square number.

11004639409 is the 52452-nd centered octagonal number.

It is an amenable number.

11004639409 is a deficient number, since it is larger than the sum of its proper divisors (501788090).

11004639409 is an frugal number, since it uses more digits than its factorization.

11004639409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9168 (or 4584 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 11004639409 in words is "eleven billion, four million, six hundred thirty-nine thousand, four hundred nine".