161017271543546 has 192 divisors, whose sum is σ = 283210828185600. Its totient is φ = 68412762000000.

The previous prime is 161017271543507. The next prime is 161017271543549. The reversal of 161017271543546 is 645345172710161.

161017271543546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161017271543546² (a number of 29 digits) contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 71531438921 + ... + 71531441171.

It is an arithmetic number, because the mean of its divisors is an integer number (1475056396800).

Almost surely, 2^{161017271543546} is an apocalyptic number.

161017271543546 is a deficient number, since it is larger than the sum of its proper divisors (122193556642054).

161017271543546 is a wasteful number, since it uses less digits than its factorization.

161017271543546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097 (or 3086 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 161017271543546 in words is "one hundred sixty-one trillion, seventeen billion, two hundred seventy-one million, five hundred forty-three thousand, five hundred forty-six".