85451649 has 12 divisors (see below), whose sum is σ = 114794736. Its totient is φ = 56541328.

The previous prime is 85451629. The next prime is 85451657. The reversal of 85451649 is 94615458.

It is not a de Polignac number, because 85451649 - 2⁷ = 85451521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85451649.

It is not an unprimeable number, because it can be changed into a prime (85451629) 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 11 ways as a sum of consecutive naturals, for example, 65962 + ... + 67244.

It is an arithmetic number, because the mean of its divisors is an integer number (9566228).

Almost surely, 2^85451649 is an apocalyptic number.

It is an amenable number.

85451649 is a deficient number, since it is larger than the sum of its proper divisors (29343087).

85451649 is a wasteful number, since it uses less digits than its factorization.

85451649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584 (or 1435 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 85451649 is about 9244.0061120707. The cubic root of 85451649 is about 440.4603463665.

The spelling of 85451649 in words is "eighty-five million, four hundred fifty-one thousand, six hundred forty-nine".