161576242209 has 16 divisors (see below), whose sum is σ = 240709492800. Its totient is φ = 107115717888.

The previous prime is 161576242147. The next prime is 161576242241. The reversal of 161576242209 is 902242675161.

161576242209 is a `hidden beast` number, since 1 + 6 + 15 + 7 + 624 + 2 + 2 + 0 + 9 = 666.

It is not a de Polignac number, because 161576242209 - 2⁷ = 161576242081 is a prime.

It is a super-3 number, since 3×161576242209³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (161576242259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16711104 + ... + 16720769.

It is an arithmetic number, because the mean of its divisors is an integer number (15044343300).

Almost surely, 2^161576242209 is an apocalyptic number.

It is an amenable number.

161576242209 is a deficient number, since it is larger than the sum of its proper divisors (79133250591).

161576242209 is a wasteful number, since it uses less digits than its factorization.

161576242209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33432061 (or 33432055 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 161576242209 in words is "one hundred sixty-one billion, five hundred seventy-six million, two hundred forty-two thousand, two hundred nine".