12400425055 has 4 divisors (see below), whose sum is σ = 14880510072. Its totient is φ = 9920340040.

The previous prime is 12400425053. The next prime is 12400425067. The reversal of 12400425055 is 55052400421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12400425055 - 2¹ = 12400425053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400425053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240042501 + ... + 1240042510.

It is an arithmetic number, because the mean of its divisors is an integer number (3720127518).

Almost surely, 2^12400425055 is an apocalyptic number.

12400425055 is a deficient number, since it is larger than the sum of its proper divisors (2480085017).

12400425055 is an equidigital number, since it uses as much as digits as its factorization.

12400425055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480085016.

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 12400425055 its reverse (55052400421), we get a palindrome (67452825476).

The spelling of 12400425055 in words is "twelve billion, four hundred million, four hundred twenty-five thousand, fifty-five".