11553503423447 has 2 divisors, whose sum is σ = 11553503423448. Its totient is φ = 11553503423446.

The previous prime is 11553503423437. The next prime is 11553503423479. The reversal of 11553503423447 is 74432430535511.

11553503423447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (74432430535511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11553503423447 - 2¹⁸ = 11553503161303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11553503423437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5776751711723 + 5776751711724.

It is an arithmetic number, because the mean of its divisors is an integer number (5776751711724).

Almost surely, 2^{11553503423447} is an apocalyptic number.

11553503423447 is a deficient number, since it is larger than the sum of its proper divisors (1).

11553503423447 is an equidigital number, since it uses as much as digits as its factorization.

11553503423447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 47.

Adding to 11553503423447 its reverse (74432430535511), we get a palindrome (85985933958958).

The spelling of 11553503423447 in words is "eleven trillion, five hundred fifty-three billion, five hundred three million, four hundred twenty-three thousand, four hundred forty-seven".