12471836649 has 4 divisors (see below), whose sum is σ = 16629115536. Its totient is φ = 8314557764.

The previous prime is 12471836639. The next prime is 12471836653. The reversal of 12471836649 is 94663817421.

It is a happy number.

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 12471836649 - 2¹⁵ = 12471803881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12471836609) 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, 2078639439 + ... + 2078639444.

It is an arithmetic number, because the mean of its divisors is an integer number (4157278884).

Almost surely, 2^12471836649 is an apocalyptic number.

It is an amenable number.

12471836649 is a deficient number, since it is larger than the sum of its proper divisors (4157278887).

12471836649 is an equidigital number, since it uses as much as digits as its factorization.

12471836649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157278886.

The product of its digits is 1741824, while the sum is 51.

The spelling of 12471836649 in words is "twelve billion, four hundred seventy-one million, eight hundred thirty-six thousand, six hundred forty-nine".