12195840471853 has 2 divisors, whose sum is σ = 12195840471854. Its totient is φ = 12195840471852.

The previous prime is 12195840471847. The next prime is 12195840471929. The reversal of 12195840471853 is 35817404859121.

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., 12038387851044 + 157452620809 = 3469638^2 + 396803^2 .

It is a cyclic number.

It is not a de Polignac number, because 12195840471853 - 2²¹ = 12195838374701 is a prime.

It is a super-4 number, since 4×12195840471853⁴ (a number of 53 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12195840471833) 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, 6097920235926 + 6097920235927.

It is an arithmetic number, because the mean of its divisors is an integer number (6097920235927).

Almost surely, 2^{12195840471853} is an apocalyptic number.

It is an amenable number.

12195840471853 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195840471853 is an equidigital number, since it uses as much as digits as its factorization.

12195840471853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 58.

It can be divided in two parts, 12195 and 840471853, that added together give a palindrome (840484048).

The spelling of 12195840471853 in words is "twelve trillion, one hundred ninety-five billion, eight hundred forty million, four hundred seventy-one thousand, eight hundred fifty-three".