12513379640 has 64 divisors (see below), whose sum is σ = 28779408000. Its totient is φ = 4894553088.

The previous prime is 12513379597. The next prime is 12513379673. The reversal of 12513379640 is 4697331521.

12513379640 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2909972 + ... + 2914268.

It is an arithmetic number, because the mean of its divisors is an integer number (449678250).

Almost surely, 2^12513379640 is an apocalyptic number.

12513379640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12513379640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14389704000).

12513379640 is an abundant number, since it is smaller than the sum of its proper divisors (16266028360).

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

12513379640 is a wasteful number, since it uses less digits than its factorization.

12513379640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5904 (or 5900 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 12513379640 in words is "twelve billion, five hundred thirteen million, three hundred seventy-nine thousand, six hundred forty".