12355423261 has 2 divisors, whose sum is σ = 12355423262. Its totient is φ = 12355423260.

The previous prime is 12355423211. The next prime is 12355423279. The reversal of 12355423261 is 16232455321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12327660900 + 27762361 = 111030^2 + 5269^2 .

It is a cyclic number.

It is not a de Polignac number, because 12355423261 - 2³³ = 3765488669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12355423211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177711630 + 6177711631.

It is an arithmetic number, because the mean of its divisors is an integer number (6177711631).

Almost surely, 2^12355423261 is an apocalyptic number.

It is an amenable number.

12355423261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355423261 is an equidigital number, since it uses as much as digits as its factorization.

12355423261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 34.

Adding to 12355423261 its reverse (16232455321), we get a palindrome (28587878582).

The spelling of 12355423261 in words is "twelve billion, three hundred fifty-five million, four hundred twenty-three thousand, two hundred sixty-one".