71128805511 has 16 divisors (see below), whose sum is σ = 101183689728. Its totient is φ = 44289148800.

The previous prime is 71128805483. The next prime is 71128805543. The reversal of 71128805511 is 11550882117.

It is not a de Polignac number, because 71128805511 - 2²⁹ = 70591934599 is a prime.

It is a super-2 number, since 2×71128805511² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71128805511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71128845511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5316535 + ... + 5329896.

It is an arithmetic number, because the mean of its divisors is an integer number (6323980608).

Almost surely, 2^71128805511 is an apocalyptic number.

71128805511 is a deficient number, since it is larger than the sum of its proper divisors (30054884217).

71128805511 is a wasteful number, since it uses less digits than its factorization.

71128805511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646582.

The product of its (nonzero) digits is 22400, while the sum is 39.

The spelling of 71128805511 in words is "seventy-one billion, one hundred twenty-eight million, eight hundred five thousand, five hundred eleven".