12541126649 has 4 divisors (see below), whose sum is σ = 12541395300. Its totient is φ = 12540858000.

The previous prime is 12541126603. The next prime is 12541126667. The reversal of 12541126649 is 94662114521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4151482624 + 8389644025 = 64432^2 + 91595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12541126649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12541146649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44102 + ... + 164399.

It is an arithmetic number, because the mean of its divisors is an integer number (3135348825).

Almost surely, 2^12541126649 is an apocalyptic number.

It is an amenable number.

12541126649 is a deficient number, since it is larger than the sum of its proper divisors (268651).

12541126649 is an equidigital number, since it uses as much as digits as its factorization.

12541126649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268650.

The product of its digits is 103680, while the sum is 41.

The spelling of 12541126649 in words is "twelve billion, five hundred forty-one million, one hundred twenty-six thousand, six hundred forty-nine".