12648940540 has 48 divisors (see below), whose sum is σ = 27559090944. Its totient is φ = 4871462400.

The previous prime is 12648940537. The next prime is 12648940543. The reversal of 12648940540 is 4504984621.

It is an interprime number because it is at equal distance from previous prime (12648940537) and next prime (12648940543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12648940543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70360 + ... + 173920.

It is an arithmetic number, because the mean of its divisors is an integer number (574147728).

Almost surely, 2^12648940540 is an apocalyptic number.

12648940540 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 12648940540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13779545472).

12648940540 is an abundant number, since it is smaller than the sum of its proper divisors (14910150404).

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

12648940540 is a wasteful number, since it uses less digits than its factorization.

12648940540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103798 (or 103796 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 12648940540 in words is "twelve billion, six hundred forty-eight million, nine hundred forty thousand, five hundred forty".