12195840471797 has 2 divisors, whose sum is σ = 12195840471798. Its totient is φ = 12195840471796.

The previous prime is 12195840471779. The next prime is 12195840471833. The reversal of 12195840471797 is 79717404859121.

Together with previous prime (12195840471779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6697195355236 + 5498645116561 = 2587894^2 + 2344919^2 .

It is an emirp because it is prime and its reverse (79717404859121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12195840471797 - 2¹⁴ = 12195840455413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12195840471707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6097920235898 + 6097920235899.

It is an arithmetic number, because the mean of its divisors is an integer number (6097920235899).

Almost surely, 2^{12195840471797} is an apocalyptic number.

It is an amenable number.

12195840471797 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195840471797 is an equidigital number, since it uses as much as digits as its factorization.

12195840471797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35562240, while the sum is 65.

The spelling of 12195840471797 in words is "twelve trillion, one hundred ninety-five billion, eight hundred forty million, four hundred seventy-one thousand, seven hundred ninety-seven".