161195128 has 8 divisors (see below), whose sum is σ = 302240880. Its totient is φ = 80597560.

The previous prime is 161195117. The next prime is 161195141. The reversal of 161195128 is 821591161.

161195128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 161195093 and 161195102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10074688 + ... + 10074703.

It is an arithmetic number, because the mean of its divisors is an integer number (37780110).

Almost surely, 2^161195128 is an apocalyptic number.

It is an amenable number.

161195128 is a deficient number, since it is larger than the sum of its proper divisors (141045752).

161195128 is a wasteful number, since it uses less digits than its factorization.

161195128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20149397 (or 20149393 counting only the distinct ones).

The product of its digits is 4320, while the sum is 34.

The square root of 161195128 is about 12696.2643324720. The cubic root of 161195128 is about 544.2318702298.

The spelling of 161195128 in words is "one hundred sixty-one million, one hundred ninety-five thousand, one hundred twenty-eight".