12646137788 has 12 divisors (see below), whose sum is σ = 22181155920. Its totient is φ = 6308664672.

The previous prime is 12646137787. The next prime is 12646137827. The reversal of 12646137788 is 88773164621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646137787) 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, 3599081 + ... + 3602592.

It is an arithmetic number, because the mean of its divisors is an integer number (1848429660).

Almost surely, 2^12646137788 is an apocalyptic number.

It is an amenable number.

12646137788 is a deficient number, since it is larger than the sum of its proper divisors (9535018132).

12646137788 is a wasteful number, since it uses less digits than its factorization.

12646137788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202116 (or 7202114 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The spelling of 12646137788 in words is "twelve billion, six hundred forty-six million, one hundred thirty-seven thousand, seven hundred eighty-eight".