80017908918845 has 8 divisors (see below), whose sum is σ = 96021546836280. Its totient is φ = 64014289712640.

The previous prime is 80017908918841. The next prime is 80017908918859. The reversal of 80017908918845 is 54881980971008.

It can be written as a sum of positive squares in 4 ways, for example, as 10529363030404 + 69488545888441 = 3244898^2 + 8335979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80017908918845 - 2² = 80017908918841 is a prime.

It is a super-2 number, since 2×80017908918845² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80017908918841) 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 7 ways as a sum of consecutive naturals, for example, 7715285 + ... + 14817605.

It is an arithmetic number, because the mean of its divisors is an integer number (12002693354535).

Almost surely, 2^{80017908918845} is an apocalyptic number.

It is an amenable number.

80017908918845 is a deficient number, since it is larger than the sum of its proper divisors (16003637917435).

80017908918845 is a wasteful number, since it uses less digits than its factorization.

80017908918845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9355615.

The product of its (nonzero) digits is 46448640, while the sum is 68.

The spelling of 80017908918845 in words is "eighty trillion, seventeen billion, nine hundred eight million, nine hundred eighteen thousand, eight hundred forty-five".