12511438759559 has 4 divisors (see below), whose sum is σ = 12511447508040. Its totient is φ = 12511430011080.

The previous prime is 12511438759553. The next prime is 12511438759613. The reversal of 12511438759559 is 95595783411521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12511438759559 - 2³² = 12507143792263 is a prime.

It is a super-2 number, since 2×12511438759559² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12511438759495 and 12511438759504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511438759553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673024 + ... + 5274645.

It is an arithmetic number, because the mean of its divisors is an integer number (3127861877010).

Almost surely, 2^{12511438759559} is an apocalyptic number.

12511438759559 is a deficient number, since it is larger than the sum of its proper divisors (8748481).

12511438759559 is an equidigital number, since it uses as much as digits as its factorization.

12511438759559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748480.

The product of its digits is 68040000, while the sum is 65.

The spelling of 12511438759559 in words is "twelve trillion, five hundred eleven billion, four hundred thirty-eight million, seven hundred fifty-nine thousand, five hundred fifty-nine".