12155422553 has 2 divisors, whose sum is σ = 12155422554. Its totient is φ = 12155422552.

The previous prime is 12155422523. The next prime is 12155422579. The reversal of 12155422553 is 35522455121.

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., 11649532489 + 505890064 = 107933^2 + 22492^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155422553 - 2¹⁰ = 12155421529 is a prime.

It is not a weakly prime, because it can be changed into another prime (12155422523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077711276 + 6077711277.

It is an arithmetic number, because the mean of its divisors is an integer number (6077711277).

Almost surely, 2^12155422553 is an apocalyptic number.

It is an amenable number.

12155422553 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155422553 is an equidigital number, since it uses as much as digits as its factorization.

12155422553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60000, while the sum is 35.

Adding to 12155422553 its reverse (35522455121), we get a palindrome (47677877674).

The spelling of 12155422553 in words is "twelve billion, one hundred fifty-five million, four hundred twenty-two thousand, five hundred fifty-three".