161320195 has 8 divisors (see below), whose sum is σ = 194430960. Its totient is φ = 128491680.

The previous prime is 161320193. The next prime is 161320217. The reversal of 161320195 is 591023161.

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

It is not a de Polignac number, because 161320195 - 2¹ = 161320193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161320193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69301 + ... + 71590.

It is an arithmetic number, because the mean of its divisors is an integer number (24303870).

Almost surely, 2^161320195 is an apocalyptic number.

161320195 is a deficient number, since it is larger than the sum of its proper divisors (33110765).

161320195 is a wasteful number, since it uses less digits than its factorization.

161320195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141125.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 161320195 is about 12701.1887238951. The cubic root of 161320195 is about 544.3725855073.

It can be divided in two parts, 161 and 320195, that added together give a square (320356 = 566²).

The spelling of 161320195 in words is "one hundred sixty-one million, three hundred twenty thousand, one hundred ninety-five".