195640444004 has 24 divisors (see below), whose sum is σ = 366583394520. Its totient is φ = 91031638016.

The previous prime is 195640443983. The next prime is 195640444039. The reversal of 195640444004 is 400444046591.

It can be written as a sum of positive squares in 4 ways, for example, as 54751320100 + 140889123904 = 233990^2 + 375352^2 .

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, 16157237 + ... + 16169340.

It is an arithmetic number, because the mean of its divisors is an integer number (15274308105).

Almost surely, 2^195640444004 is an apocalyptic number.

It is an amenable number.

195640444004 is a deficient number, since it is larger than the sum of its proper divisors (170942950516).

195640444004 is a wasteful number, since it uses less digits than its factorization.

195640444004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32326687 (or 32326685 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 195640444004 in words is "one hundred ninety-five billion, six hundred forty million, four hundred forty-four thousand, four".