195426874728 has 24 divisors (see below), whose sum is σ = 529281119250. Its totient is φ = 65142291552.

The previous prime is 195426874693. The next prime is 195426874729. The reversal of 195426874728 is 827478624591.

It is a happy number.

195426874728 is a `hidden beast` number, since 1 + 9 + 542 + 6 + 87 + 4 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 187989882084 + 7436992644 = 433578^2 + 86238^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (195426874729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1357131003 + ... + 1357131146.

Almost surely, 2^195426874728 is an apocalyptic number.

195426874728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

195426874728 is an abundant number, since it is smaller than the sum of its proper divisors (333854244522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195426874728 is a wasteful number, since it uses less digits than its factorization.

195426874728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714262161 (or 2714262154 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 195426874728 in words is "one hundred ninety-five billion, four hundred twenty-six million, eight hundred seventy-four thousand, seven hundred twenty-eight".