12845542572949 has 2 divisors, whose sum is σ = 12845542572950. Its totient is φ = 12845542572948.

The previous prime is 12845542572943. The next prime is 12845542573043. The reversal of 12845542572949 is 94927524554821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12778787516049 + 66755056900 = 3574743^2 + 258370^2 .

It is a cyclic number.

It is not a de Polignac number, because 12845542572949 - 2⁵ = 12845542572917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12845542572943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6422771286474 + 6422771286475.

It is an arithmetic number, because the mean of its divisors is an integer number (6422771286475).

Almost surely, 2^{12845542572949} is an apocalyptic number.

It is an amenable number.

12845542572949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12845542572949 is an equidigital number, since it uses as much as digits as its factorization.

12845542572949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304000, while the sum is 67.

The spelling of 12845542572949 in words is "twelve trillion, eight hundred forty-five billion, five hundred forty-two million, five hundred seventy-two thousand, nine hundred forty-nine".