80688110991 has 8 divisors (see below), whose sum is σ = 108571158960. Its totient is φ = 53298568512.

The previous prime is 80688110989. The next prime is 80688111029. The reversal of 80688110991 is 19901188608.

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

It is not a de Polignac number, because 80688110991 - 2¹ = 80688110989 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80688111991) 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, 123375990 + ... + 123376643.

It is an arithmetic number, because the mean of its divisors is an integer number (13571394870).

Almost surely, 2^80688110991 is an apocalyptic number.

80688110991 is a deficient number, since it is larger than the sum of its proper divisors (27883047969).

80688110991 is a wasteful number, since it uses less digits than its factorization.

80688110991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246752745.

The product of its (nonzero) digits is 248832, while the sum is 51.

The spelling of 80688110991 in words is "eighty billion, six hundred eighty-eight million, one hundred ten thousand, nine hundred ninety-one".