8141805481 has 4 divisors (see below), whose sum is σ = 8275277764. Its totient is φ = 8008333200.

The previous prime is 8141805449. The next prime is 8141805487. The reversal of 8141805481 is 1845081418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1845081418 = 2 ⋅922540709.

It can be written as a sum of positive squares in 2 ways, for example, as 701190400 + 7440615081 = 26480^2 + 86259^2 .

It is a cyclic number.

It is not a de Polignac number, because 8141805481 - 2⁵ = 8141805449 is a prime.

It is a super-2 number, since 2×8141805481² (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 (8141805487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66736050 + ... + 66736171.

It is an arithmetic number, because the mean of its divisors is an integer number (2068819441).

Almost surely, 2^8141805481 is an apocalyptic number.

It is an amenable number.

8141805481 is a deficient number, since it is larger than the sum of its proper divisors (133472283).

8141805481 is a wasteful number, since it uses less digits than its factorization.

8141805481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133472282.

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 8141805481 is about 90231.9537691610. The cubic root of 8141805481 is about 2011.7479807740.

Adding to 8141805481 its reverse (1845081418), we get a palindrome (9986886899).

The spelling of 8141805481 in words is "eight billion, one hundred forty-one million, eight hundred five thousand, four hundred eighty-one".