12545400012 has 24 divisors (see below), whose sum is σ = 29290637376. Its totient is φ = 4179223248.

The previous prime is 12545400011. The next prime is 12545400061. The reversal of 12545400012 is 21000454521.

It is a super-2 number, since 2×12545400012² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12545400011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301758 + ... + 340805.

It is an arithmetic number, because the mean of its divisors is an integer number (1220443224).

Almost surely, 2^12545400012 is an apocalyptic number.

12545400012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12545400012 is an abundant number, since it is smaller than the sum of its proper divisors (16745237364).

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

12545400012 is a wasteful number, since it uses less digits than its factorization.

12545400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644197 (or 644195 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 12545400012 its reverse (21000454521), we get a palindrome (33545854533).

The spelling of 12545400012 in words is "twelve billion, five hundred forty-five million, four hundred thousand, twelve".