195669120077 has 2 divisors, whose sum is σ = 195669120078. Its totient is φ = 195669120076.

The previous prime is 195669119981. The next prime is 195669120103. The reversal of 195669120077 is 770021966591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113016320041 + 82652800036 = 336179^2 + 287494^2 .

It is a cyclic number.

It is not a de Polignac number, because 195669120077 - 2¹⁶ = 195669054541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195669120677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97834560038 + 97834560039.

It is an arithmetic number, because the mean of its divisors is an integer number (97834560039).

Almost surely, 2^195669120077 is an apocalyptic number.

It is an amenable number.

195669120077 is a deficient number, since it is larger than the sum of its proper divisors (1).

195669120077 is an equidigital number, since it uses as much as digits as its factorization.

195669120077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1428840, while the sum is 53.

The spelling of 195669120077 in words is "one hundred ninety-five billion, six hundred sixty-nine million, one hundred twenty thousand, seventy-seven".