11089806981 has 16 divisors (see below), whose sum is σ = 16566593088. Its totient is φ = 6539443200.

The previous prime is 11089806967. The next prime is 11089807019. The reversal of 11089806981 is 18960898011.

It is not a de Polignac number, because 11089806981 - 2¹³ = 11089798789 is a prime.

It is a super-2 number, since 2×11089806981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11089806961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4540060 + ... + 4542501.

It is an arithmetic number, because the mean of its divisors is an integer number (1035412068).

Almost surely, 2^11089806981 is an apocalyptic number.

11089806981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11089806981 is a deficient number, since it is larger than the sum of its proper divisors (5476786107).

11089806981 is a wasteful number, since it uses less digits than its factorization.

11089806981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082612.

The product of its (nonzero) digits is 248832, while the sum is 51.

It can be divided in two parts, 1108 and 9806981, that added together give a palindrome (9808089).

The spelling of 11089806981 in words is "eleven billion, eighty-nine million, eight hundred six thousand, nine hundred eighty-one".