1101558556543 has 2 divisors, whose sum is σ = 1101558556544. Its totient is φ = 1101558556542.

The previous prime is 1101558556477. The next prime is 1101558556613. The reversal of 1101558556543 is 3456558551011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101558556543 - 2²¹ = 1101556459391 is a prime.

It is a super-2 number, since 2×1101558556543² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101558556243) 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, 550779278271 + 550779278272.

It is an arithmetic number, because the mean of its divisors is an integer number (550779278272).

Almost surely, 2^{1101558556543} is an apocalyptic number.

1101558556543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101558556543 is an equidigital number, since it uses as much as digits as its factorization.

1101558556543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800000, while the sum is 49.

The spelling of 1101558556543 in words is "one trillion, one hundred one billion, five hundred fifty-eight million, five hundred fifty-six thousand, five hundred forty-three".