161847682653547 has 4 divisors (see below), whose sum is σ = 176561108349336. Its totient is φ = 147134256957760.

The previous prime is 161847682653541. The next prime is 161847682653593. The reversal of 161847682653547 is 745356286748161.

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 161847682653547 - 2³ = 161847682653539 is a prime.

It is a super-4 number, since 4×161847682653547⁴ (a number of 58 digits) contains 4444 as substring.

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 161847682653547.

It is not an unprimeable number, because it can be changed into a prime (161847682653541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7356712847878 + ... + 7356712847899.

It is an arithmetic number, because the mean of its divisors is an integer number (44140277087334).

Almost surely, 2^{161847682653547} is an apocalyptic number.

161847682653547 is a deficient number, since it is larger than the sum of its proper divisors (14713425695789).

161847682653547 is a wasteful number, since it uses less digits than its factorization.

161847682653547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14713425695788.

The product of its digits is 1625702400, while the sum is 73.

The spelling of 161847682653547 in words is "one hundred sixty-one trillion, eight hundred forty-seven billion, six hundred eighty-two million, six hundred fifty-three thousand, five hundred forty-seven".