195686366387 has 2 divisors, whose sum is σ = 195686366388. Its totient is φ = 195686366386.

The previous prime is 195686366353. The next prime is 195686366399. The reversal of 195686366387 is 783663686591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195686366387 - 2²⁸ = 195417930931 is a prime.

It is not a weakly prime, because it can be changed into another prime (195686366327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97843183193 + 97843183194.

It is an arithmetic number, because the mean of its divisors is an integer number (97843183194).

Almost surely, 2^195686366387 is an apocalyptic number.

195686366387 is a deficient number, since it is larger than the sum of its proper divisors (1).

195686366387 is an equidigital number, since it uses as much as digits as its factorization.

195686366387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235146240, while the sum is 68.

The spelling of 195686366387 in words is "one hundred ninety-five billion, six hundred eighty-six million, three hundred sixty-six thousand, three hundred eighty-seven".