12540276500 has 24 divisors (see below), whose sum is σ = 27387964968. Its totient is φ = 5016110400.

The previous prime is 12540276461. The next prime is 12540276503. The reversal of 12540276500 is 567204521.

It can be written as a sum of positive squares in 4 ways, for example, as 1504353796 + 11035922704 = 38786^2 + 105052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540276503) 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, 12539777 + ... + 12540776.

It is an arithmetic number, because the mean of its divisors is an integer number (1141165207).

Almost surely, 2^12540276500 is an apocalyptic number.

12540276500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12540276500 is an abundant number, since it is smaller than the sum of its proper divisors (14847688468).

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

12540276500 is a wasteful number, since it uses less digits than its factorization.

12540276500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25080572 (or 25080560 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 12540276500 in words is "twelve billion, five hundred forty million, two hundred seventy-six thousand, five hundred".