12400454525 has 6 divisors (see below), whose sum is σ = 15376563642. Its totient is φ = 9920363600.

The previous prime is 12400454497. The next prime is 12400454581. The reversal of 12400454525 is 52545400421.

It can be written as a sum of positive squares in 3 ways, for example, as 29008996 + 12371445529 = 5386^2 + 111227^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12400454525 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12400454491 and 12400454500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248009066 + ... + 248009115.

It is an arithmetic number, because the mean of its divisors is an integer number (2562760607).

Almost surely, 2^12400454525 is an apocalyptic number.

It is an amenable number.

12400454525 is a deficient number, since it is larger than the sum of its proper divisors (2976109117).

12400454525 is an equidigital number, since it uses as much as digits as its factorization.

12400454525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496018191 (or 496018186 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 12400454525 its reverse (52545400421), we get a palindrome (64945854946).

The spelling of 12400454525 in words is "twelve billion, four hundred million, four hundred fifty-four thousand, five hundred twenty-five".