8161675721167 has 4 divisors (see below), whose sum is σ = 8163870313680. Its totient is φ = 8159481128656.

The previous prime is 8161675721153. The next prime is 8161675721189. The reversal of 8161675721167 is 7611275761618.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8161675721167 is a prime.

It is a super-2 number, since 2×8161675721167² (a number of 27 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 (8161675727167) 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 3 ways as a sum of consecutive naturals, for example, 1097290678 + ... + 1097298115.

It is an arithmetic number, because the mean of its divisors is an integer number (2040967578420).

Almost surely, 2^{8161675721167} is an apocalyptic number.

8161675721167 is a deficient number, since it is larger than the sum of its proper divisors (2194592513).

8161675721167 is a wasteful number, since it uses less digits than its factorization.

8161675721167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194592512.

The product of its digits is 5927040, while the sum is 58.

The spelling of 8161675721167 in words is "eight trillion, one hundred sixty-one billion, six hundred seventy-five million, seven hundred twenty-one thousand, one hundred sixty-seven".