161727121675 has 48 divisors (see below), whose sum is σ = 236674566144. Its totient is φ = 107280000000.

The previous prime is 161727121639. The next prime is 161727121709. The reversal of 161727121675 is 576121727161.

It is not a de Polignac number, because 161727121675 - 2¹⁹ = 161726597387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21701700 + ... + 21709150.

It is an arithmetic number, because the mean of its divisors is an integer number (4930720128).

Almost surely, 2^161727121675 is an apocalyptic number.

161727121675 is a deficient number, since it is larger than the sum of its proper divisors (74947444469).

161727121675 is a wasteful number, since it uses less digits than its factorization.

161727121675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11500 (or 11495 counting only the distinct ones).

The product of its digits is 246960, while the sum is 46.

The spelling of 161727121675 in words is "one hundred sixty-one billion, seven hundred twenty-seven million, one hundred twenty-one thousand, six hundred seventy-five".