195156009 has 6 divisors (see below), whose sum is σ = 281892026. Its totient is φ = 130104000.

The previous prime is 195156007. The next prime is 195156037. The reversal of 195156009 is 900651591.

195156009 is a `hidden beast` number, since 1 + 95 + 1 + 560 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 124545600 + 70610409 = 11160^2 + 8403^2 .

It is not a de Polignac number, because 195156009 - 2¹ = 195156007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195156001) 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 5 ways as a sum of consecutive naturals, for example, 10841992 + ... + 10842009.

Almost surely, 2^195156009 is an apocalyptic number.

It is an amenable number.

195156009 is a deficient number, since it is larger than the sum of its proper divisors (86736017).

195156009 is a wasteful number, since it uses less digits than its factorization.

195156009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21684007 (or 21684004 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 195156009 is about 13969.8249452167. The cubic root of 195156009 is about 580.0436045299.

The spelling of 195156009 in words is "one hundred ninety-five million, one hundred fifty-six thousand, nine".