71080811111 has 16 divisors (see below), whose sum is σ = 78164701920. Its totient is φ = 64360074240.

The previous prime is 71080811083. The next prime is 71080811119. The reversal of 71080811111 is 11111808017.

It is not a de Polignac number, because 71080811111 - 2¹⁴ = 71080794727 is a prime.

It is a super-2 number, since 2×71080811111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71080811119) 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, 578885 + ... + 690846.

It is an arithmetic number, because the mean of its divisors is an integer number (4885293870).

Almost surely, 2^71080811111 is an apocalyptic number.

71080811111 is a deficient number, since it is larger than the sum of its proper divisors (7083890809).

71080811111 is a wasteful number, since it uses less digits than its factorization.

71080811111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269874.

The product of its (nonzero) digits is 448, while the sum is 29.

The spelling of 71080811111 in words is "seventy-one billion, eighty million, eight hundred eleven thousand, one hundred eleven".