195489405929 has 2 divisors, whose sum is σ = 195489405930. Its totient is φ = 195489405928.

The previous prime is 195489405907. The next prime is 195489406003. The reversal of 195489405929 is 929504984591.

195489405929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192931777600 + 2557628329 = 439240^2 + 50573^2 .

It is a cyclic number.

It is not a de Polignac number, because 195489405929 - 2⁸ = 195489405673 is a prime.

It is a super-2 number, since 2×195489405929² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195489405829) 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 as a sum of consecutive naturals, namely, 97744702964 + 97744702965.

It is an arithmetic number, because the mean of its divisors is an integer number (97744702965).

Almost surely, 2^195489405929 is an apocalyptic number.

It is an amenable number.

195489405929 is a deficient number, since it is larger than the sum of its proper divisors (1).

195489405929 is an equidigital number, since it uses as much as digits as its factorization.

195489405929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41990400, while the sum is 65.

The spelling of 195489405929 in words is "one hundred ninety-five billion, four hundred eighty-nine million, four hundred five thousand, nine hundred twenty-nine".