71722817167 has 4 divisors (see below), whose sum is σ = 71798078160. Its totient is φ = 71647556176.

The previous prime is 71722817051. The next prime is 71722817183. The reversal of 71722817167 is 76171822717.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71722817167 - 2³⁵ = 37363078799 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71722817167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71722817767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37629067 + ... + 37630972.

It is an arithmetic number, because the mean of its divisors is an integer number (17949519540).

Almost surely, 2^71722817167 is an apocalyptic number.

71722817167 is a deficient number, since it is larger than the sum of its proper divisors (75260993).

71722817167 is an equidigital number, since it uses as much as digits as its factorization.

71722817167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75260992.

The product of its digits is 460992, while the sum is 49.

The spelling of 71722817167 in words is "seventy-one billion, seven hundred twenty-two million, eight hundred seventeen thousand, one hundred sixty-seven".