195648509 has 8 divisors (see below), whose sum is σ = 226936128. Its totient is φ = 165195360.

The previous prime is 195648499. The next prime is 195648527. The reversal of 195648509 is 905846591.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195648509 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195648209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208112 + ... + 209049.

It is an arithmetic number, because the mean of its divisors is an integer number (28367016).

Almost surely, 2^195648509 is an apocalyptic number.

It is an amenable number.

195648509 is a deficient number, since it is larger than the sum of its proper divisors (31287619).

195648509 is an equidigital number, since it uses as much as digits as its factorization.

195648509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417235.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 195648509 is about 13987.4411169449. The cubic root of 195648509 is about 580.5311315843.

The spelling of 195648509 in words is "one hundred ninety-five million, six hundred forty-eight thousand, five hundred nine".