161895106 has 4 divisors (see below), whose sum is σ = 242842662. Its totient is φ = 80947552.

The previous prime is 161895089. The next prime is 161895109. The reversal of 161895106 is 601598161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 128936025 + 32959081 = 11355^2 + 5741^2 .

It is not an unprimeable number, because it can be changed into a prime (161895109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40473775 + ... + 40473778.

Almost surely, 2^161895106 is an apocalyptic number.

161895106 is a deficient number, since it is larger than the sum of its proper divisors (80947556).

161895106 is an equidigital number, since it uses as much as digits as its factorization.

161895106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80947555.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 161895106 is about 12723.8007686383. The cubic root of 161895106 is about 545.0184950096.

The spelling of 161895106 in words is "one hundred sixty-one million, eight hundred ninety-five thousand, one hundred six".