80041312781 has 8 divisors (see below), whose sum is σ = 82838838264. Its totient is φ = 77284039680.

The previous prime is 80041312733. The next prime is 80041312811. The reversal of 80041312781 is 18721314008.

It can be written as a sum of positive squares in 4 ways, for example, as 2529184681 + 77512128100 = 50291^2 + 278410^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80041312781 - 2²² = 80037118477 is a prime.

It is a super-2 number, since 2×80041312781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80041312181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10059050 + ... + 10067003.

It is an arithmetic number, because the mean of its divisors is an integer number (10354854783).

Almost surely, 2^80041312781 is an apocalyptic number.

It is an amenable number.

80041312781 is a deficient number, since it is larger than the sum of its proper divisors (2797525483).

80041312781 is a wasteful number, since it uses less digits than its factorization.

80041312781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20126191.

The product of its (nonzero) digits is 10752, while the sum is 35.

Adding to 80041312781 its reverse (18721314008), we get a palindrome (98762626789).

The spelling of 80041312781 in words is "eighty billion, forty-one million, three hundred twelve thousand, seven hundred eighty-one".