12491138964 has 24 divisors (see below), whose sum is σ = 29473476480. Its totient is φ = 4116929344.

The previous prime is 12491138963. The next prime is 12491138969. The reversal of 12491138964 is 46983119421.

It is a happy number.

12491138964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491138963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5846844 + ... + 5848979.

It is an arithmetic number, because the mean of its divisors is an integer number (1228061520).

Almost surely, 2^12491138964 is an apocalyptic number.

It is an amenable number.

12491138964 is an abundant number, since it is smaller than the sum of its proper divisors (16982337516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12491138964 is a wasteful number, since it uses less digits than its factorization.

12491138964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11695919 (or 11695917 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The spelling of 12491138964 in words is "twelve billion, four hundred ninety-one million, one hundred thirty-eight thousand, nine hundred sixty-four".