195361889693 has 2 divisors, whose sum is σ = 195361889694. Its totient is φ = 195361889692.

The previous prime is 195361889659. The next prime is 195361889759. The reversal of 195361889693 is 396988163591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184867321444 + 10494568249 = 429962^2 + 102443^2 .

It is a cyclic number.

It is not a de Polignac number, because 195361889693 - 2¹⁰ = 195361888669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195361889893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97680944846 + 97680944847.

It is an arithmetic number, because the mean of its divisors is an integer number (97680944847).

Almost surely, 2^195361889693 is an apocalyptic number.

It is an amenable number.

195361889693 is a deficient number, since it is larger than the sum of its proper divisors (1).

195361889693 is an equidigital number, since it uses as much as digits as its factorization.

195361889693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75582720, while the sum is 68.

The spelling of 195361889693 in words is "one hundred ninety-five billion, three hundred sixty-one million, eight hundred eighty-nine thousand, six hundred ninety-three".