195716638 has 16 divisors (see below), whose sum is σ = 316653120. Its totient is φ = 90189216.

The previous prime is 195716627. The next prime is 195716641. The reversal of 195716638 is 836617591.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12043 + ... + 23161.

It is an arithmetic number, because the mean of its divisors is an integer number (19790820).

Almost surely, 2^195716638 is an apocalyptic number.

195716638 is a deficient number, since it is larger than the sum of its proper divisors (120936482).

195716638 is a wasteful number, since it uses less digits than its factorization.

195716638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11811.

The product of its digits is 272160, while the sum is 46.

The square root of 195716638 is about 13989.8762682162. The cubic root of 195716638 is about 580.5985082209.

The spelling of 195716638 in words is "one hundred ninety-five million, seven hundred sixteen thousand, six hundred thirty-eight".