12505353540 has 96 divisors (see below), whose sum is σ = 35626106880. Its totient is φ = 3276873600.

The previous prime is 12505353533. The next prime is 12505353547. The reversal of 12505353540 is 4535350521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12505353533) and next prime (12505353547).

It is not an unprimeable number, because it can be changed into a prime (12505353547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1320141 + ... + 1329579.

It is an arithmetic number, because the mean of its divisors is an integer number (371105280).

Almost surely, 2^12505353540 is an apocalyptic number.

12505353540 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 12505353540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17813053440).

12505353540 is an abundant number, since it is smaller than the sum of its proper divisors (23120753340).

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

12505353540 is a wasteful number, since it uses less digits than its factorization.

12505353540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9833 (or 9831 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 33.

The spelling of 12505353540 in words is "twelve billion, five hundred five million, three hundred fifty-three thousand, five hundred forty".