80136665281 has 8 divisors (see below), whose sum is σ = 80436432384. Its totient is φ = 79837150320.

The previous prime is 80136665263. The next prime is 80136665339. The reversal of 80136665281 is 18256663108.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80136665281 is a prime.

It is a super-2 number, since 2×80136665281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80136665681) 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, 586251 + ... + 709903.

It is an arithmetic number, because the mean of its divisors is an integer number (10054554048).

Almost surely, 2^80136665281 is an apocalyptic number.

It is an amenable number.

80136665281 is a deficient number, since it is larger than the sum of its proper divisors (299767103).

80136665281 is a wasteful number, since it uses less digits than its factorization.

80136665281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126071.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 80136665281 in words is "eighty billion, one hundred thirty-six million, six hundred sixty-five thousand, two hundred eighty-one".