85554811 has 2 divisors, whose sum is σ = 85554812. Its totient is φ = 85554810.

The previous prime is 85554809. The next prime is 85554827. The reversal of 85554811 is 11845558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85554811 - 2¹ = 85554809 is a prime.

Together with 85554809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85554851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42777405 + 42777406.

It is an arithmetic number, because the mean of its divisors is an integer number (42777406).

Almost surely, 2^85554811 is an apocalyptic number.

85554811 is a deficient number, since it is larger than the sum of its proper divisors (1).

85554811 is an equidigital number, since it uses as much as digits as its factorization.

85554811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32000, while the sum is 37.

The square root of 85554811 is about 9249.5843690406. The cubic root of 85554811 is about 440.6375245237.

It can be divided in two parts, 8555 and 4811, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 85554811 in words is "eighty-five million, five hundred fifty-four thousand, eight hundred eleven".