12513887637640 has 32 divisors (see below), whose sum is σ = 28159998526080. Its totient is φ = 5004888149952.

The previous prime is 12513887637637. The next prime is 12513887637649. The reversal of 12513887637640 is 4673678831521.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12513887637649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20536752 + ... + 21137311.

It is an arithmetic number, because the mean of its divisors is an integer number (879999953940).

Almost surely, 2^{12513887637640} is an apocalyptic number.

12513887637640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12513887637640 is an abundant number, since it is smaller than the sum of its proper divisors (15646110888440).

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

12513887637640 is a wasteful number, since it uses less digits than its factorization.

12513887637640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41681581 (or 41681577 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 61.

The spelling of 12513887637640 in words is "twelve trillion, five hundred thirteen billion, eight hundred eighty-seven million, six hundred thirty-seven thousand, six hundred forty".