195388381769 has 16 divisors (see below), whose sum is σ = 226623329280. Its totient is φ = 164987707920.

The previous prime is 195388381753. The next prime is 195388381807. The reversal of 195388381769 is 967183883591.

195388381769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 195388381769 - 2⁴ = 195388381753 is a prime.

It is a super-2 number, since 2×195388381769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195388381699 and 195388381708.

It is not an unprimeable number, because it can be changed into a prime (195388381739) 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 15 ways as a sum of consecutive naturals, for example, 484442 + ... + 790860.

It is an arithmetic number, because the mean of its divisors is an integer number (14163958080).

Almost surely, 2^195388381769 is an apocalyptic number.

It is an amenable number.

195388381769 is a deficient number, since it is larger than the sum of its proper divisors (31234947511).

195388381769 is a wasteful number, since it uses less digits than its factorization.

195388381769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307780.

The product of its digits is 78382080, while the sum is 68.

The spelling of 195388381769 in words is "one hundred ninety-five billion, three hundred eighty-eight million, three hundred eighty-one thousand, seven hundred sixty-nine".