195640568 has 16 divisors (see below), whose sum is σ = 386133000. Its totient is φ = 92671776.

The previous prime is 195640559. The next prime is 195640589. The reversal of 195640568 is 865046591.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643403 + ... + 643706.

Almost surely, 2^195640568 is an apocalyptic number.

It is an amenable number.

195640568 is a deficient number, since it is larger than the sum of its proper divisors (190492432).

195640568 is a wasteful number, since it uses less digits than its factorization.

195640568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287134 (or 1287130 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 195640568 is about 13987.1572522797. The cubic root of 195640568 is about 580.5232772607.

It can be divided in two parts, 1956 and 40568, that added together give a palindrome (42524).

The spelling of 195640568 in words is "one hundred ninety-five million, six hundred forty thousand, five hundred sixty-eight".