161843437071 has 16 divisors (see below), whose sum is σ = 250192753920. Its totient is φ = 103204510200.

The previous prime is 161843437069. The next prime is 161843437073. The reversal of 161843437071 is 170734348161.

161843437071 is a `hidden beast` number, since 1 + 6 + 184 + 34 + 370 + 71 = 666.

It is an interprime number because it is at equal distance from previous prime (161843437069) and next prime (161843437073).

It is not a de Polignac number, because 161843437071 - 2¹ = 161843437069 is a prime.

It is a super-3 number, since 3×161843437071³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161843437073) 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, 130308105 + ... + 130309346.

It is an arithmetic number, because the mean of its divisors is an integer number (15637047120).

Almost surely, 2^161843437071 is an apocalyptic number.

161843437071 is a deficient number, since it is larger than the sum of its proper divisors (88349316849).

161843437071 is a wasteful number, since it uses less digits than its factorization.

161843437071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260617483 (or 260617477 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 161843437071 in words is "one hundred sixty-one billion, eight hundred forty-three million, four hundred thirty-seven thousand, seventy-one".