85236955543 has 2 divisors, whose sum is σ = 85236955544. Its totient is φ = 85236955542.

The previous prime is 85236955519. The next prime is 85236955549. The reversal of 85236955543 is 34555963258.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85236955543 - 2¹⁷ = 85236824471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85236955549) 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, 42618477771 + 42618477772.

It is an arithmetic number, because the mean of its divisors is an integer number (42618477772).

Almost surely, 2^85236955543 is an apocalyptic number.

85236955543 is a deficient number, since it is larger than the sum of its proper divisors (1).

85236955543 is an equidigital number, since it uses as much as digits as its factorization.

85236955543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440000, while the sum is 55.

The spelling of 85236955543 in words is "eighty-five billion, two hundred thirty-six million, nine hundred fifty-five thousand, five hundred forty-three".