12551230323157 has 2 divisors, whose sum is σ = 12551230323158. Its totient is φ = 12551230323156.

The previous prime is 12551230323127. The next prime is 12551230323257. The reversal of 12551230323157 is 75132303215521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12090405219876 + 460825103281 = 3477126^2 + 678841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12551230323157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551230323127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275615161578 + 6275615161579.

It is an arithmetic number, because the mean of its divisors is an integer number (6275615161579).

Almost surely, 2^{12551230323157} is an apocalyptic number.

It is an amenable number.

12551230323157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551230323157 is an equidigital number, since it uses as much as digits as its factorization.

12551230323157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 40.

Adding to 12551230323157 its reverse (75132303215521), we get a palindrome (87683533538678).

The spelling of 12551230323157 in words is "twelve trillion, five hundred fifty-one billion, two hundred thirty million, three hundred twenty-three thousand, one hundred fifty-seven".