12540640300 has 72 divisors (see below), whose sum is σ = 28668390800. Its totient is φ = 4748440320.

The previous prime is 12540640261. The next prime is 12540640303. The reversal of 12540640300 is 304604521.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12540640303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3853474 + ... + 3856726.

Almost surely, 2^12540640300 is an apocalyptic number.

12540640300 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 12540640300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14334195400).

12540640300 is an abundant number, since it is smaller than the sum of its proper divisors (16127750500).

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

12540640300 is a wasteful number, since it uses less digits than its factorization.

12540640300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 12540640300 in words is "twelve billion, five hundred forty million, six hundred forty thousand, three hundred".