128354262440543 has 2 divisors, whose sum is σ = 128354262440544. Its totient is φ = 128354262440542.

The previous prime is 128354262440419. The next prime is 128354262440603. The reversal of 128354262440543 is 345044262453821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128354262440543 - 2³⁶ = 128285542963807 is a prime.

It is a super-2 number, since 2×128354262440543² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128354262440743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64177131220271 + 64177131220272.

It is an arithmetic number, because the mean of its divisors is an integer number (64177131220272).

Almost surely, 2^{128354262440543} is an apocalyptic number.

128354262440543 is a deficient number, since it is larger than the sum of its proper divisors (1).

128354262440543 is an equidigital number, since it uses as much as digits as its factorization.

128354262440543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22118400, while the sum is 53.

The spelling of 128354262440543 in words is "one hundred twenty-eight trillion, three hundred fifty-four billion, two hundred sixty-two million, four hundred forty thousand, five hundred forty-three".