161693470205 has 8 divisors (see below), whose sum is σ = 194403165792. Its totient is φ = 129107441808.

The previous prime is 161693470181. The next prime is 161693470243. The reversal of 161693470205 is 502074396161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161693470205 - 2¹⁰ = 161693469181 is a prime.

It is a super-2 number, since 2×161693470205² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30913919 + ... + 30919148.

It is an arithmetic number, because the mean of its divisors is an integer number (24300395724).

Almost surely, 2^161693470205 is an apocalyptic number.

It is an amenable number.

161693470205 is a deficient number, since it is larger than the sum of its proper divisors (32709695587).

161693470205 is an equidigital number, since it uses as much as digits as its factorization.

161693470205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61833595.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 161693470205 in words is "one hundred sixty-one billion, six hundred ninety-three million, four hundred seventy thousand, two hundred five".