12551144022415 has 4 divisors (see below), whose sum is σ = 15061372826904. Its totient is φ = 10040915217928.

The previous prime is 12551144022413. The next prime is 12551144022451. The reversal of 12551144022415 is 51422044115521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12551144022415 - 2¹ = 12551144022413 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 (12551144022413) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1255114402237 + ... + 1255114402246.

It is an arithmetic number, because the mean of its divisors is an integer number (3765343206726).

Almost surely, 2^{12551144022415} is an apocalyptic number.

12551144022415 is a deficient number, since it is larger than the sum of its proper divisors (2510228804489).

12551144022415 is an equidigital number, since it uses as much as digits as its factorization.

12551144022415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510228804488.

The product of its (nonzero) digits is 64000, while the sum is 37.

Adding to 12551144022415 its reverse (51422044115521), we get a palindrome (63973188137936).

The spelling of 12551144022415 in words is "twelve trillion, five hundred fifty-one billion, one hundred forty-four million, twenty-two thousand, four hundred fifteen".