12553144455491 has 2 divisors, whose sum is σ = 12553144455492. Its totient is φ = 12553144455490.

The previous prime is 12553144455473. The next prime is 12553144455497. The reversal of 12553144455491 is 19455444135521.

12553144455491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (19455444135521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12553144455491 is a prime.

It is not a weakly prime, because it can be changed into another prime (12553144455497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6276572227745 + 6276572227746.

It is an arithmetic number, because the mean of its divisors is an integer number (6276572227746).

Almost surely, 2^{12553144455491} is an apocalyptic number.

12553144455491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12553144455491 is an equidigital number, since it uses as much as digits as its factorization.

12553144455491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640000, while the sum is 53.

The spelling of 12553144455491 in words is "twelve trillion, five hundred fifty-three billion, one hundred forty-four million, four hundred fifty-five thousand, four hundred ninety-one".