12555343057 has 2 divisors, whose sum is σ = 12555343058. Its totient is φ = 12555343056.

The previous prime is 12555342991. The next prime is 12555343091. The reversal of 12555343057 is 75034355521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11765957841 + 789385216 = 108471^2 + 28096^2 .

It is a cyclic number.

It is not a de Polignac number, because 12555343057 - 2¹¹ = 12555341009 is a prime.

It is not a weakly prime, because it can be changed into another prime (12555344057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277671528 + 6277671529.

It is an arithmetic number, because the mean of its divisors is an integer number (6277671529).

Almost surely, 2^12555343057 is an apocalyptic number.

It is an amenable number.

12555343057 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555343057 is an equidigital number, since it uses as much as digits as its factorization.

12555343057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315000, while the sum is 40.

Adding to 12555343057 its reverse (75034355521), we get a palindrome (87589698578).

The spelling of 12555343057 in words is "twelve billion, five hundred fifty-five million, three hundred forty-three thousand, fifty-seven".