195312830777 has 2 divisors, whose sum is σ = 195312830778. Its totient is φ = 195312830776.

The previous prime is 195312830773. The next prime is 195312830857. The reversal of 195312830777 is 777038213591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191210300176 + 4102530601 = 437276^2 + 64051^2 .

It is a cyclic number.

It is not a de Polignac number, because 195312830777 - 2² = 195312830773 is a prime.

It is a super-2 number, since 2×195312830777² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195312830773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97656415388 + 97656415389.

It is an arithmetic number, because the mean of its divisors is an integer number (97656415389).

Almost surely, 2^195312830777 is an apocalyptic number.

It is an amenable number.

195312830777 is a deficient number, since it is larger than the sum of its proper divisors (1).

195312830777 is an equidigital number, since it uses as much as digits as its factorization.

195312830777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 195312830777 in words is "one hundred ninety-five billion, three hundred twelve million, eight hundred thirty thousand, seven hundred seventy-seven".