12655312157 has 2 divisors, whose sum is σ = 12655312158. Its totient is φ = 12655312156.

The previous prime is 12655312151. The next prime is 12655312177. The reversal of 12655312157 is 75121355621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6604650361 + 6050661796 = 81269^2 + 77786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12655312157 is a prime.

It is a super-2 number, since 2×12655312157² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12655312157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12655312151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327656078 + 6327656079.

It is an arithmetic number, because the mean of its divisors is an integer number (6327656079).

Almost surely, 2^12655312157 is an apocalyptic number.

It is an amenable number.

12655312157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12655312157 is an equidigital number, since it uses as much as digits as its factorization.

12655312157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 38.

Adding to 12655312157 its reverse (75121355621), we get a palindrome (87776667778).

The spelling of 12655312157 in words is "twelve billion, six hundred fifty-five million, three hundred twelve thousand, one hundred fifty-seven".