71894687711 has 16 divisors (see below), whose sum is σ = 91154177280. Its totient is φ = 55072308480.

The previous prime is 71894687677. The next prime is 71894687713. The reversal of 71894687711 is 11778649817.

It is not a de Polignac number, because 71894687711 - 2¹⁰ = 71894686687 is a prime.

It is a super-2 number, since 2×71894687711² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71894687713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7908146 + ... + 7917231.

It is an arithmetic number, because the mean of its divisors is an integer number (5697136080).

Almost surely, 2^71894687711 is an apocalyptic number.

71894687711 is a deficient number, since it is larger than the sum of its proper divisors (19259489569).

71894687711 is a wasteful number, since it uses less digits than its factorization.

71894687711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15825454.

The product of its digits is 4741632, while the sum is 59.

The spelling of 71894687711 in words is "seventy-one billion, eight hundred ninety-four million, six hundred eighty-seven thousand, seven hundred eleven".