195565128 has 64 divisors (see below), whose sum is σ = 547801920. Its totient is φ = 57657600.

The previous prime is 195565109. The next prime is 195565147. The reversal of 195565128 is 821565591.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (195565109) and next prime (195565147).

It is a self number, because there is not a number n which added to its sum of digits gives 195565128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243 + ... + 19778.

It is an arithmetic number, because the mean of its divisors is an integer number (8559405).

Almost surely, 2^195565128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195565128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273900960).

195565128 is an abundant number, since it is smaller than the sum of its proper divisors (352236792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195565128 is a wasteful number, since it uses less digits than its factorization.

195565128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20078 (or 20074 counting only the distinct ones).

The product of its digits is 108000, while the sum is 42.

The square root of 195565128 is about 13984.4602327012. The cubic root of 195565128 is about 580.4486500897.

The spelling of 195565128 in words is "one hundred ninety-five million, five hundred sixty-five thousand, one hundred twenty-eight".