195391706328 has 512 divisors, whose sum is σ = 716131584000. Its totient is φ = 48493873152.

The previous prime is 195391706303. The next prime is 195391706369. The reversal of 195391706328 is 823607193591.

195391706328 is a `hidden beast` number, since 1 + 9 + 539 + 1 + 70 + 6 + 32 + 8 = 666.

195391706328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 27062703 + ... + 27069921.

It is an arithmetic number, because the mean of its divisors is an integer number (1398694500).

Almost surely, 2^195391706328 is an apocalyptic number.

195391706328 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 195391706328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358065792000).

195391706328 is an abundant number, since it is smaller than the sum of its proper divisors (520739877672).

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

195391706328 is a wasteful number, since it uses less digits than its factorization.

195391706328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7283 (or 7261 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 195391706328 in words is "one hundred ninety-five billion, three hundred ninety-one million, seven hundred six thousand, three hundred twenty-eight".