12511333543 has 2 divisors, whose sum is σ = 12511333544. Its totient is φ = 12511333542.

The previous prime is 12511333511. The next prime is 12511333547. The reversal of 12511333543 is 34533311521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12511333543 - 2⁵ = 12511333511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12511333547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255666771 + 6255666772.

It is an arithmetic number, because the mean of its divisors is an integer number (6255666772).

Almost surely, 2^12511333543 is an apocalyptic number.

12511333543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511333543 is an equidigital number, since it uses as much as digits as its factorization.

12511333543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The spelling of 12511333543 in words is "twelve billion, five hundred eleven million, three hundred thirty-three thousand, five hundred forty-three".