12274278157 has 2 divisors, whose sum is σ = 12274278158. Its totient is φ = 12274278156.

The previous prime is 12274278151. The next prime is 12274278169. The reversal of 12274278157 is 75187247221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8630224201 + 3644053956 = 92899^2 + 60366^2 .

It is an emirp because it is prime and its reverse (75187247221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12274278157 - 2¹¹ = 12274276109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12274278151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6137139078 + 6137139079.

It is an arithmetic number, because the mean of its divisors is an integer number (6137139079).

Almost surely, 2^12274278157 is an apocalyptic number.

It is an amenable number.

12274278157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12274278157 is an equidigital number, since it uses as much as digits as its factorization.

12274278157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 46.

The spelling of 12274278157 in words is "twelve billion, two hundred seventy-four million, two hundred seventy-eight thousand, one hundred fifty-seven".