161574475161 has 24 divisors (see below), whose sum is σ = 237284350912. Its totient is φ = 97722741600.

The previous prime is 161574475141. The next prime is 161574475171.

161574475161 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 161574475161 - 2¹³ = 161574466969 is a prime.

It is a super-3 number, since 3×161574475161³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161574475161.

It is not an unprimeable number, because it can be changed into a prime (161574475141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280210 + ... + 633771.

Almost surely, 2^161574475161 is an apocalyptic number.

161574475161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161574475161 is a deficient number, since it is larger than the sum of its proper divisors (75709875751).

161574475161 is a wasteful number, since it uses less digits than its factorization.

161574475161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914493 (or 914482 counting only the distinct ones).

The product of its digits is 705600, while the sum is 48.

The spelling of 161574475161 in words is "one hundred sixty-one billion, five hundred seventy-four million, four hundred seventy-five thousand, one hundred sixty-one".