80682698785 has 16 divisors (see below), whose sum is σ = 110400219216. Its totient is φ = 56076300288.

The previous prime is 80682698749. The next prime is 80682698801. The reversal of 80682698785 is 58789628608.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 727219089 + 79955479696 = 26967^2 + 282764^2 .

It is a cyclic number.

It is not a de Polignac number, because 80682698785 - 2⁹ = 80682698273 is a prime.

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 80682698785.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36506904 + ... + 36509113.

It is an arithmetic number, because the mean of its divisors is an integer number (6900013701).

Almost surely, 2^80682698785 is an apocalyptic number.

80682698785 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80682698785 is a deficient number, since it is larger than the sum of its proper divisors (29717520431).

80682698785 is a wasteful number, since it uses less digits than its factorization.

80682698785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73016052.

The product of its (nonzero) digits is 92897280, while the sum is 67.

The spelling of 80682698785 in words is "eighty billion, six hundred eighty-two million, six hundred ninety-eight thousand, seven hundred eighty-five".