195395585389 has 2 divisors, whose sum is σ = 195395585390. Its totient is φ = 195395585388.

The previous prime is 195395585351. The next prime is 195395585471. The reversal of 195395585389 is 983585593591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146733431364 + 48662154025 = 383058^2 + 220595^2 .

It is a cyclic number.

It is not a de Polignac number, because 195395585389 - 2⁷ = 195395585261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195395585309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97697792694 + 97697792695.

It is an arithmetic number, because the mean of its divisors is an integer number (97697792695).

Almost surely, 2^195395585389 is an apocalyptic number.

It is an amenable number.

195395585389 is a deficient number, since it is larger than the sum of its proper divisors (1).

195395585389 is an equidigital number, since it uses as much as digits as its factorization.

195395585389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440000, while the sum is 70.

The spelling of 195395585389 in words is "one hundred ninety-five billion, three hundred ninety-five million, five hundred eighty-five thousand, three hundred eighty-nine".