12551372069 has 2 divisors, whose sum is σ = 12551372070. Its totient is φ = 12551372068.

The previous prime is 12551372059. The next prime is 12551372087. The reversal of 12551372069 is 96027315521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8338063969 + 4213308100 = 91313^2 + 64910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12551372069 is a prime.

It is a super-2 number, since 2×12551372069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551372059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275686034 + 6275686035.

It is an arithmetic number, because the mean of its divisors is an integer number (6275686035).

Almost surely, 2^12551372069 is an apocalyptic number.

It is an amenable number.

12551372069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551372069 is an equidigital number, since it uses as much as digits as its factorization.

12551372069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 12551372069 in words is "twelve billion, five hundred fifty-one million, three hundred seventy-two thousand, sixty-nine".