8045681366689 has 4 divisors (see below), whose sum is σ = 8090132645140. Its totient is φ = 8001230088240.

The previous prime is 8045681366677. The next prime is 8045681366717. The reversal of 8045681366689 is 9866631865408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222987006225 + 7822694360464 = 472215^2 + 2796908^2 .

It is a cyclic number.

It is not a de Polignac number, because 8045681366689 - 2⁷ = 8045681366561 is a prime.

It is a super-3 number, since 3×8045681366689³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8045681366609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22225638954 + ... + 22225639315.

It is an arithmetic number, because the mean of its divisors is an integer number (2022533161285).

Almost surely, 2^{8045681366689} is an apocalyptic number.

It is an amenable number.

8045681366689 is a deficient number, since it is larger than the sum of its proper divisors (44451278451).

8045681366689 is a wasteful number, since it uses less digits than its factorization.

8045681366689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44451278450.

The product of its (nonzero) digits is 358318080, while the sum is 70.

The spelling of 8045681366689 in words is "eight trillion, forty-five billion, six hundred eighty-one million, three hundred sixty-six thousand, six hundred eighty-nine".