12551516131263 has 4 divisors (see below), whose sum is σ = 16735354841688. Its totient is φ = 8367677420840.

The previous prime is 12551516131241. The next prime is 12551516131327. The reversal of 12551516131263 is 36213161515521.

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 12551516131263 - 2¹⁰ = 12551516130239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551516131223) 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, 2091919355208 + ... + 2091919355213.

It is an arithmetic number, because the mean of its divisors is an integer number (4183838710422).

Almost surely, 2^{12551516131263} is an apocalyptic number.

12551516131263 is a deficient number, since it is larger than the sum of its proper divisors (4183838710425).

12551516131263 is an equidigital number, since it uses as much as digits as its factorization.

12551516131263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183838710424.

The product of its digits is 162000, while the sum is 42.

Adding to 12551516131263 its reverse (36213161515521), we get a palindrome (48764677646784).

The spelling of 12551516131263 in words is "twelve trillion, five hundred fifty-one billion, five hundred sixteen million, one hundred thirty-one thousand, two hundred sixty-three".