8081645302881 has 20 divisors (see below), whose sum is σ = 12073004606212. Its totient is φ = 5387574601728.

The previous prime is 8081645302811. The next prime is 8081645302883. The reversal of 8081645302881 is 1882035461808.

8081645302881 is a `hidden beast` number, since 8 + 0 + 8 + 1 + 6 + 4 + 530 + 28 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7691520142881 + 390125160000 = 2773359^2 + 624600^2 .

It is not a de Polignac number, because 8081645302881 - 2¹⁸ = 8081645040737 is a prime.

It is a super-2 number, since 2×8081645302881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8081645302883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 593985 + ... + 4064001.

Almost surely, 2^{8081645302881} is an apocalyptic number.

8081645302881 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8081645302881 is a deficient number, since it is larger than the sum of its proper divisors (3991359303331).

8081645302881 is a wasteful number, since it uses less digits than its factorization.

8081645302881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498782 (or 3498773 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The spelling of 8081645302881 in words is "eight trillion, eighty-one billion, six hundred forty-five million, three hundred two thousand, eight hundred eighty-one".