13553638187 has 2 divisors, whose sum is σ = 13553638188. Its totient is φ = 13553638186.

The previous prime is 13553638159. The next prime is 13553638261. The reversal of 13553638187 is 78183635531.

It is a weak prime.

It is an emirp because it is prime and its reverse (78183635531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13553638187 - 2⁸ = 13553637931 is a prime.

It is a super-2 number, since 2×13553638187² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13553638487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6776819093 + 6776819094.

It is an arithmetic number, because the mean of its divisors is an integer number (6776819094).

Almost surely, 2^13553638187 is an apocalyptic number.

13553638187 is a deficient number, since it is larger than the sum of its proper divisors (1).

13553638187 is an equidigital number, since it uses as much as digits as its factorization.

13553638187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 50.

The spelling of 13553638187 in words is "thirteen billion, five hundred fifty-three million, six hundred thirty-eight thousand, one hundred eighty-seven".