12557610709 has 4 divisors (see below), whose sum is σ = 14351555104. Its totient is φ = 10763666316.

The previous prime is 12557610691. The next prime is 12557610733. The reversal of 12557610709 is 90701675521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12557610709 - 2³³ = 3967676117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557610509) 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, 896972187 + ... + 896972200.

It is an arithmetic number, because the mean of its divisors is an integer number (3587888776).

Almost surely, 2^12557610709 is an apocalyptic number.

It is an amenable number.

12557610709 is a deficient number, since it is larger than the sum of its proper divisors (1793944395).

12557610709 is an equidigital number, since it uses as much as digits as its factorization.

12557610709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793944394.

The product of its (nonzero) digits is 132300, while the sum is 43.

The spelling of 12557610709 in words is "twelve billion, five hundred fifty-seven million, six hundred ten thousand, seven hundred nine".