195128926757 has 4 divisors (see below), whose sum is σ = 195210470700. Its totient is φ = 195047382816.

The previous prime is 195128926723. The next prime is 195128926777. The reversal of 195128926757 is 757629821591.

195128926757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 441734²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4055906596 + 191073020161 = 63686^2 + 437119^2 .

It is a cyclic number.

It is not a de Polignac number, because 195128926757 - 2⁸ = 195128926501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195128926757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195128926777) 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 3 ways as a sum of consecutive naturals, for example, 40768382 + ... + 40773167.

It is an arithmetic number, because the mean of its divisors is an integer number (48802617675).

Almost surely, 2^195128926757 is an apocalyptic number.

It is an amenable number.

195128926757 is a deficient number, since it is larger than the sum of its proper divisors (81543943).

195128926757 is an equidigital number, since it uses as much as digits as its factorization.

195128926757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81543942.

The product of its digits is 19051200, while the sum is 62.

The spelling of 195128926757 in words is "one hundred ninety-five billion, one hundred twenty-eight million, nine hundred twenty-six thousand, seven hundred fifty-seven".