80905101871 has 16 divisors (see below), whose sum is σ = 93426917760. Its totient is φ = 69362385120.

The previous prime is 80905101803. The next prime is 80905101947. The reversal of 80905101871 is 17810150908.

It is a cyclic number.

It is not a de Polignac number, because 80905101871 - 2²⁵ = 80871547439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80905101971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2935365 + ... + 2962798.

It is an arithmetic number, because the mean of its divisors is an integer number (5839182360).

Almost surely, 2^80905101871 is an apocalyptic number.

80905101871 is a deficient number, since it is larger than the sum of its proper divisors (12521815889).

80905101871 is a wasteful number, since it uses less digits than its factorization.

80905101871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898246.

The product of its (nonzero) digits is 20160, while the sum is 40.

The spelling of 80905101871 in words is "eighty billion, nine hundred five million, one hundred one thousand, eight hundred seventy-one".