12550421144 has 16 divisors (see below), whose sum is σ = 23578279200. Its totient is φ = 6262880032.

The previous prime is 12550421131. The next prime is 12550421167. The reversal of 12550421144 is 44112405521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536992 + ... + 1545135.

It is an arithmetic number, because the mean of its divisors is an integer number (1473642450).

Almost surely, 2^12550421144 is an apocalyptic number.

It is an amenable number.

12550421144 is a deficient number, since it is larger than the sum of its proper divisors (11027858056).

12550421144 is a wasteful number, since it uses less digits than its factorization.

12550421144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082642 (or 3082638 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 12550421144 its reverse (44112405521), we get a palindrome (56662826665).

The spelling of 12550421144 in words is "twelve billion, five hundred fifty million, four hundred twenty-one thousand, one hundred forty-four".