11209499067481 has 45 divisors (see below), whose sum is σ = 13355329891659. Its totient is φ = 9401349672000.

The previous prime is 11209499067443. The next prime is 11209499067499. The reversal of 11209499067481 is 18476099490211.

The square root of 11209499067481 is 3348059.

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

It can be written as a sum of positive squares in 7 ways, for example, as 9407353913881 + 1802145153600 = 3067141^2 + 1342440^2 .

It is not a de Polignac number, because 11209499067481 - 2²⁹ = 11208962196569 is a prime.

It is a super-2 number, since 2×11209499067481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11209499067421) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 6224040781 + ... + 6224042581.

Almost surely, 2^{11209499067481} is an apocalyptic number.

11209499067481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11209499067481 is the 3348059-th square number.

11209499067481 is the 1674030-th centered octagonal number.

It is an amenable number.

11209499067481 is a deficient number, since it is larger than the sum of its proper divisors (2145830824178).

11209499067481 is an frugal number, since it uses more digits than its factorization.

11209499067481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676 (or 1825 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 11209499067481 in words is "eleven trillion, two hundred nine billion, four hundred ninety-nine million, sixty-seven thousand, four hundred eighty-one".