12605137157 has 2 divisors, whose sum is σ = 12605137158. Its totient is φ = 12605137156.

The previous prime is 12605137147. The next prime is 12605137201. The reversal of 12605137157 is 75173150621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12366774436 + 238362721 = 111206^2 + 15439^2 .

It is an emirp because it is prime and its reverse (75173150621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12605137157 - 2⁴ = 12605137141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12605137157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12605137147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6302568578 + 6302568579.

It is an arithmetic number, because the mean of its divisors is an integer number (6302568579).

Almost surely, 2^12605137157 is an apocalyptic number.

It is an amenable number.

12605137157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12605137157 is an equidigital number, since it uses as much as digits as its factorization.

12605137157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 38.

Adding to 12605137157 its reverse (75173150621), we get a palindrome (87778287778).

The spelling of 12605137157 in words is "twelve billion, six hundred five million, one hundred thirty-seven thousand, one hundred fifty-seven".