195868639154 has 8 divisors (see below), whose sum is σ = 293812979628. Its totient is φ = 97930979280.

The previous prime is 195868639151. The next prime is 195868639171. The reversal of 195868639154 is 451936868591.

195868639154 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 191036303929 + 4832335225 = 437077^2 + 69515^2 .

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

It is not an unprimeable number, because it can be changed into a prime (195868639151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596197 + ... + 1714520.

Almost surely, 2^195868639154 is an apocalyptic number.

195868639154 is a deficient number, since it is larger than the sum of its proper divisors (97944340474).

195868639154 is a wasteful number, since it uses less digits than its factorization.

195868639154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340300.

The product of its digits is 55987200, while the sum is 65.

The spelling of 195868639154 in words is "one hundred ninety-five billion, eight hundred sixty-eight million, six hundred thirty-nine thousand, one hundred fifty-four".