161123442671 has 8 divisors (see below), whose sum is σ = 163219533120. Its totient is φ = 159028766208.

The previous prime is 161123442647. The next prime is 161123442677. The reversal of 161123442671 is 176244321161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161123442671 is a prime.

It is a super-2 number, since 2×161123442671² (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 (161123442677) 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 7 ways as a sum of consecutive naturals, for example, 123146 + ... + 580871.

It is an arithmetic number, because the mean of its divisors is an integer number (20402441640).

Almost surely, 2^161123442671 is an apocalyptic number.

161123442671 is a deficient number, since it is larger than the sum of its proper divisors (2096090449).

161123442671 is an equidigital number, since it uses as much as digits as its factorization.

161123442671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706993.

The product of its digits is 48384, while the sum is 38.

The spelling of 161123442671 in words is "one hundred sixty-one billion, one hundred twenty-three million, four hundred forty-two thousand, six hundred seventy-one".