12551433455 has 24 divisors (see below), whose sum is σ = 17529308496. Its totient is φ = 8591348480.

The previous prime is 12551433451. The next prime is 12551433467. The reversal of 12551433455 is 55433415521.

It is not a de Polignac number, because 12551433455 - 2² = 12551433451 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 (12551433451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 599897 + ... + 620466.

It is an arithmetic number, because the mean of its divisors is an integer number (730387854).

Almost surely, 2^12551433455 is an apocalyptic number.

12551433455 is a deficient number, since it is larger than the sum of its proper divisors (4977875041).

12551433455 is a wasteful number, since it uses less digits than its factorization.

12551433455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220407 (or 1220396 counting only the distinct ones).

The product of its digits is 180000, while the sum is 38.

Adding to 12551433455 its reverse (55433415521), we get a palindrome (67984848976).

The spelling of 12551433455 in words is "twelve billion, five hundred fifty-one million, four hundred thirty-three thousand, four hundred fifty-five".