11418109281 has 12 divisors (see below), whose sum is σ = 16493958052. Its totient is φ = 7611549696.

The previous prime is 11418109277. The next prime is 11418109289. The reversal of 11418109281 is 18290181411.

It can be written as a sum of positive squares in 2 ways, for example, as 5989366881 + 5428742400 = 77391^2 + 73680^2 .

It is not a de Polignac number, because 11418109281 - 2² = 11418109277 is a prime.

It is a super-2 number, since 2×11418109281² (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 (11418109289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131745 + ... + 200481.

Almost surely, 2^11418109281 is an apocalyptic number.

It is an amenable number.

11418109281 is a deficient number, since it is larger than the sum of its proper divisors (5075848771).

11418109281 is a wasteful number, since it uses less digits than its factorization.

11418109281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87200 (or 87197 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The spelling of 11418109281 in words is "eleven billion, four hundred eighteen million, one hundred nine thousand, two hundred eighty-one".