161847682612261 has 8 divisors (see below), whose sum is σ = 162611362396224. Its totient is φ = 161084946228000.

The previous prime is 161847682612183. The next prime is 161847682612267. The reversal of 161847682612261 is 162216286748161.

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

It is a cyclic number.

It is not a de Polignac number, because 161847682612261 - 2³⁹ = 161297926798373 is a prime.

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 161847682612261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161847682612267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235506000 + ... + 236192233.

It is an arithmetic number, because the mean of its divisors is an integer number (20326420299528).

Almost surely, 2^{161847682612261} is an apocalyptic number.

It is an amenable number.

161847682612261 is a deficient number, since it is larger than the sum of its proper divisors (763679783963).

161847682612261 is a wasteful number, since it uses less digits than its factorization.

161847682612261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471699851.

The product of its digits is 18579456, while the sum is 61.

The spelling of 161847682612261 in words is "one hundred sixty-one trillion, eight hundred forty-seven billion, six hundred eighty-two million, six hundred twelve thousand, two hundred sixty-one".