11581348369 has 16 divisors (see below), whose sum is σ = 12514532800. Its totient is φ = 10682171136.

The previous prime is 11581348343. The next prime is 11581348421. The reversal of 11581348369 is 96384318511.

It is a cyclic number.

It is not a de Polignac number, because 11581348369 - 2¹⁵ = 11581315601 is a prime.

It is a super-2 number, since 2×11581348369² (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 (11581348319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233077 + ... + 278365.

It is an arithmetic number, because the mean of its divisors is an integer number (782158300).

Almost surely, 2^11581348369 is an apocalyptic number.

11581348369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11581348369 is a deficient number, since it is larger than the sum of its proper divisors (933184431).

11581348369 is a wasteful number, since it uses less digits than its factorization.

11581348369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45664.

The product of its digits is 622080, while the sum is 49.

The spelling of 11581348369 in words is "eleven billion, five hundred eighty-one million, three hundred forty-eight thousand, three hundred sixty-nine".