80993755665 has 24 divisors (see below), whose sum is σ = 140397828480. Its totient is φ = 43194007584.

The previous prime is 80993755663. The next prime is 80993755669. The reversal of 80993755665 is 56655739908.

It is not a de Polignac number, because 80993755665 - 2¹ = 80993755663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80993755663) 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 23 ways as a sum of consecutive naturals, for example, 842664 + ... + 933846.

It is an arithmetic number, because the mean of its divisors is an integer number (5849909520).

Almost surely, 2^80993755665 is an apocalyptic number.

It is an amenable number.

80993755665 is a deficient number, since it is larger than the sum of its proper divisors (59404072815).

80993755665 is a wasteful number, since it uses less digits than its factorization.

80993755665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110933 (or 110930 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 63.

The spelling of 80993755665 in words is "eighty billion, nine hundred ninety-three million, seven hundred fifty-five thousand, six hundred sixty-five".