195378438528 has 1344 divisors, whose sum is σ = 774002703600. Its totient is φ = 48534183936.

The previous prime is 195378438527. The next prime is 195378438539. The reversal of 195378438528 is 825834873591.

195378438528 is a `hidden beast` number, since 1 + 9 + 5 + 3 + 78 + 4 + 38 + 528 = 666.

195378438528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195378438527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 1129355050 + ... + 1129355222.

Almost surely, 2^195378438528 is an apocalyptic number.

195378438528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195378438528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387001351800).

195378438528 is an abundant number, since it is smaller than the sum of its proper divisors (578624265072).

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

195378438528 is a wasteful number, since it uses less digits than its factorization.

195378438528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 217 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 195378438528 in words is "one hundred ninety-five billion, three hundred seventy-eight million, four hundred thirty-eight thousand, five hundred twenty-eight".