85491243511 has 2 divisors, whose sum is σ = 85491243512. Its totient is φ = 85491243510.

The previous prime is 85491243449. The next prime is 85491243517. The reversal of 85491243511 is 11534219458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85491243511 - 2¹¹ = 85491241463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85491243517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42745621755 + 42745621756.

It is an arithmetic number, because the mean of its divisors is an integer number (42745621756).

Almost surely, 2^85491243511 is an apocalyptic number.

85491243511 is a deficient number, since it is larger than the sum of its proper divisors (1).

85491243511 is an equidigital number, since it uses as much as digits as its factorization.

85491243511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The spelling of 85491243511 in words is "eighty-five billion, four hundred ninety-one million, two hundred forty-three thousand, five hundred eleven".