161017271543547 has 32 divisors (see below), whose sum is σ = 238759628025600. Its totient is φ = 107247906226944.

The previous prime is 161017271543507. The next prime is 161017271543549. The reversal of 161017271543547 is 745345172710161.

161017271543547 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 17 + 271 + 5 + 4 + 354 + 7 = 666.

It is not a de Polignac number, because 161017271543547 - 2¹¹ = 161017271541499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161017271543493 and 161017271543502.

It is not an unprimeable number, because it can be changed into a prime (161017271543549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133313488 + ... + 134515874.

It is an arithmetic number, because the mean of its divisors is an integer number (7461238375800).

Almost surely, 2^{161017271543547} is an apocalyptic number.

161017271543547 is a deficient number, since it is larger than the sum of its proper divisors (77742356482053).

161017271543547 is a wasteful number, since it uses less digits than its factorization.

161017271543547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206872 (or 1206866 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 54.

The spelling of 161017271543547 in words is "one hundred sixty-one trillion, seventeen billion, two hundred seventy-one million, five hundred forty-three thousand, five hundred forty-seven".