11541849489 has 63 divisors (see below), whose sum is σ = 18195126187. Its totient is φ = 7317476496.

The previous prime is 11541849481. The next prime is 11541849499. The reversal of 11541849489 is 98494814511.

The square root of 11541849489 is 107433.

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

11541849489 is a `hidden beast` number, since 1 + 1 + 541 + 8 + 4 + 94 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10499076225 + 1042773264 = 102465^2 + 32292^2 .

It is not a de Polignac number, because 11541849489 - 2³ = 11541849481 is a prime.

It is a super-2 number, since 2×11541849489² (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 (11541849481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 66715807 + ... + 66715979.

Almost surely, 2^11541849489 is an apocalyptic number.

11541849489 is the 107433-rd square number.

11541849489 is the 53717-th centered octagonal number.

It is an amenable number.

11541849489 is a deficient number, since it is larger than the sum of its proper divisors (6653276698).

11541849489 is an frugal number, since it uses more digits than its factorization.

11541849489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 199 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The spelling of 11541849489 in words is "eleven billion, five hundred forty-one million, eight hundred forty-nine thousand, four hundred eighty-nine".