135021420505543 has 16 divisors (see below), whose sum is σ = 162001597234176. Its totient is φ = 110893950476640.

The previous prime is 135021420505451. The next prime is 135021420505549. The reversal of 135021420505543 is 345505024120531.

It is a cyclic number.

It is not a de Polignac number, because 135021420505543 - 2⁴¹ = 132822397249991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135021420505496 and 135021420505505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135021420505549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10044735171 + ... + 10044748612.

It is an arithmetic number, because the mean of its divisors is an integer number (10125099827136).

Almost surely, 2^{135021420505543} is an apocalyptic number.

135021420505543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135021420505543 is a deficient number, since it is larger than the sum of its proper divisors (26980176728633).

135021420505543 is a wasteful number, since it uses less digits than its factorization.

135021420505543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20089483854.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 135021420505543 in words is "one hundred thirty-five trillion, twenty-one billion, four hundred twenty million, five hundred five thousand, five hundred forty-three".