80187109101 has 18 divisors (see below), whose sum is σ = 127312684590. Its totient is φ = 48598247280.

The previous prime is 80187109069. The next prime is 80187109129. The reversal of 80187109101 is 10190178108.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50399801001 + 29787308100 = 224499^2 + 172590^2 .

It is not a de Polignac number, because 80187109101 - 2⁵ = 80187109069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80187109151) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36815766 + ... + 36817943.

Almost surely, 2^80187109101 is an apocalyptic number.

It is an amenable number.

80187109101 is a deficient number, since it is larger than the sum of its proper divisors (47125575489).

80187109101 is a wasteful number, since it uses less digits than its factorization.

80187109101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73633737 (or 73633723 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 36.

The spelling of 80187109101 in words is "eighty billion, one hundred eighty-seven million, one hundred nine thousand, one hundred one".