12545442061 has 2 divisors, whose sum is σ = 12545442062. Its totient is φ = 12545442060.

The previous prime is 12545442029. The next prime is 12545442101. The reversal of 12545442061 is 16024454521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8575686025 + 3969756036 = 92605^2 + 63006^2 .

It is a cyclic number.

It is not a de Polignac number, because 12545442061 - 2⁵ = 12545442029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12545442761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272721030 + 6272721031.

It is an arithmetic number, because the mean of its divisors is an integer number (6272721031).

Almost surely, 2^12545442061 is an apocalyptic number.

It is an amenable number.

12545442061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545442061 is an equidigital number, since it uses as much as digits as its factorization.

12545442061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 12545442061 its reverse (16024454521), we get a palindrome (28569896582).

The spelling of 12545442061 in words is "twelve billion, five hundred forty-five million, four hundred forty-two thousand, sixty-one".