81114114413481 has 16 divisors (see below), whose sum is σ = 113856938822400. Its totient is φ = 51224311525968.

The previous prime is 81114114413477. The next prime is 81114114413491. The reversal of 81114114413481 is 18431441141118.

It is a happy number.

It is not a de Polignac number, because 81114114413481 - 2² = 81114114413477 is a prime.

It is a super-2 number, since 2×81114114413481² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81114114413401) 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, 78027331 + ... + 79060056.

It is an arithmetic number, because the mean of its divisors is an integer number (7116058676400).

Almost surely, 2^{81114114413481} is an apocalyptic number.

It is an amenable number.

81114114413481 is a deficient number, since it is larger than the sum of its proper divisors (32742824408919).

81114114413481 is a wasteful number, since it uses less digits than its factorization.

81114114413481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157096468.

The product of its digits is 49152, while the sum is 42.

Adding to 81114114413481 its reverse (18431441141118), we get a palindrome (99545555554599).

The spelling of 81114114413481 in words is "eighty-one trillion, one hundred fourteen billion, one hundred fourteen million, four hundred thirteen thousand, four hundred eighty-one".