12671057049 has 48 divisors (see below), whose sum is σ = 20893070016. Its totient is φ = 6787200000.

The previous prime is 12671056967. The next prime is 12671057051. The reversal of 12671057049 is 94075017621.

It is a happy number.

It is not a de Polignac number, because 12671057049 - 2⁹ = 12671056537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12671057049.

It is not an unprimeable number, because it can be changed into a prime (12671057059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 617149 + ... + 637349.

It is an arithmetic number, because the mean of its divisors is an integer number (435272292).

Almost surely, 2^12671057049 is an apocalyptic number.

It is an amenable number.

12671057049 is a deficient number, since it is larger than the sum of its proper divisors (8222012967).

12671057049 is a wasteful number, since it uses less digits than its factorization.

12671057049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20486 (or 20479 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 12671057049 in words is "twelve billion, six hundred seventy-one million, fifty-seven thousand, forty-nine".