85544649 has 6 divisors (see below), whose sum is σ = 123564506. Its totient is φ = 57029760.

The previous prime is 85544639. The next prime is 85544651. The reversal of 85544649 is 94644558.

It can be written as a sum of positive squares in only one way, i.e., 81812025 + 3732624 = 9045^2 + 1932^2 .

It is not a de Polignac number, because 85544649 - 2¹⁹ = 85020361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85544609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4752472 + ... + 4752489.

Almost surely, 2^85544649 is an apocalyptic number.

It is an amenable number.

85544649 is a deficient number, since it is larger than the sum of its proper divisors (38019857).

85544649 is a wasteful number, since it uses less digits than its factorization.

85544649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504967 (or 9504964 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 85544649 is about 9249.0350307478. The cubic root of 85544649 is about 440.6200778687.

Subtracting 85544649 from its reverse (94644558), we obtain a palindrome (9099909).

It can be divided in two parts, 8554 and 4649, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 85544649 in words is "eighty-five million, five hundred forty-four thousand, six hundred forty-nine".