12551503999 has 2 divisors, whose sum is σ = 12551504000. Its totient is φ = 12551503998.

The previous prime is 12551503997. The next prime is 12551504051. The reversal of 12551503999 is 99930515521.

It is a weak prime.

It is an emirp because it is prime and its reverse (99930515521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12551503999 - 2¹ = 12551503997 is a prime.

Together with 12551503997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551503997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275751999 + 6275752000.

It is an arithmetic number, because the mean of its divisors is an integer number (6275752000).

Almost surely, 2^12551503999 is an apocalyptic number.

12551503999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551503999 is an equidigital number, since it uses as much as digits as its factorization.

12551503999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 546750, while the sum is 49.

The spelling of 12551503999 in words is "twelve billion, five hundred fifty-one million, five hundred three thousand, nine hundred ninety-nine".