80881386679 has 4 divisors (see below), whose sum is σ = 80881955784. Its totient is φ = 80880817576.

The previous prime is 80881386637. The next prime is 80881386749. The reversal of 80881386679 is 97668318808.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 80881386679 - 2¹¹ = 80881384631 is a prime.

It is a super-2 number, since 2×80881386679² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80881386679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80881386479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128169 + ... + 422125.

It is an arithmetic number, because the mean of its divisors is an integer number (20220488946).

Almost surely, 2^80881386679 is an apocalyptic number.

80881386679 is a deficient number, since it is larger than the sum of its proper divisors (569105).

80881386679 is a wasteful number, since it uses less digits than its factorization.

80881386679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569104.

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 80881386679 in words is "eighty billion, eight hundred eighty-one million, three hundred eighty-six thousand, six hundred seventy-nine".