12561514443 has 6 divisors (see below), whose sum is σ = 18144409764. Its totient is φ = 8374342956.

The previous prime is 12561514439. The next prime is 12561514447. The reversal of 12561514443 is 34441516521.

12561514443 is a `hidden beast` number, since 1 + 2 + 561 + 51 + 4 + 4 + 43 = 666.

It is an interprime number because it is at equal distance from previous prime (12561514439) and next prime (12561514447).

It is not a de Polignac number, because 12561514443 - 2² = 12561514439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12561514398 and 12561514407.

It is not an unprimeable number, because it can be changed into a prime (12561514447) 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 5 ways as a sum of consecutive naturals, for example, 697861905 + ... + 697861922.

It is an arithmetic number, because the mean of its divisors is an integer number (3024068294).

Almost surely, 2^12561514443 is an apocalyptic number.

12561514443 is a deficient number, since it is larger than the sum of its proper divisors (5582895321).

12561514443 is a wasteful number, since it uses less digits than its factorization.

12561514443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395723833 (or 1395723830 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 12561514443 in words is "twelve billion, five hundred sixty-one million, five hundred fourteen thousand, four hundred forty-three".