135581455543 has 2 divisors, whose sum is σ = 135581455544. Its totient is φ = 135581455542.

The previous prime is 135581455517. The next prime is 135581455609. The reversal of 135581455543 is 345554185531.

It is a weak prime.

It is an emirp because it is prime and its reverse (345554185531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135581455543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135581455643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67790727771 + 67790727772.

It is an arithmetic number, because the mean of its divisors is an integer number (67790727772).

Almost surely, 2^135581455543 is an apocalyptic number.

135581455543 is a deficient number, since it is larger than the sum of its proper divisors (1).

135581455543 is an equidigital number, since it uses as much as digits as its factorization.

135581455543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600000, while the sum is 49.

The spelling of 135581455543 in words is "one hundred thirty-five billion, five hundred eighty-one million, four hundred fifty-five thousand, five hundred forty-three".