12649845238 has 4 divisors (see below), whose sum is σ = 18974767860. Its totient is φ = 6324922618.

The previous prime is 12649845191. The next prime is 12649845239. The reversal of 12649845238 is 83254894621.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649845239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3162461308 + ... + 3162461311.

It is an arithmetic number, because the mean of its divisors is an integer number (4743691965).

Almost surely, 2^12649845238 is an apocalyptic number.

12649845238 is a deficient number, since it is larger than the sum of its proper divisors (6324922622).

12649845238 is an equidigital number, since it uses as much as digits as its factorization.

12649845238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6324922621.

The product of its digits is 3317760, while the sum is 52.

The spelling of 12649845238 in words is "twelve billion, six hundred forty-nine million, eight hundred forty-five thousand, two hundred thirty-eight".