85210645 has 16 divisors (see below), whose sum is σ = 110784240. Its totient is φ = 62916672.

The previous prime is 85210633. The next prime is 85210673. The reversal of 85210645 is 54601258.

It can be written as a sum of positive squares in 8 ways, for example, as 50140561 + 35070084 = 7081^2 + 5922^2 .

It is not a de Polignac number, because 85210645 - 2¹⁵ = 85177877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7107 + ... + 14863.

It is an arithmetic number, because the mean of its divisors is an integer number (6924015).

Almost surely, 2^85210645 is an apocalyptic number.

It is an amenable number.

85210645 is a deficient number, since it is larger than the sum of its proper divisors (25573595).

85210645 is an equidigital number, since it uses as much as digits as its factorization.

85210645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801 (or 7775 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 85210645 is about 9230.9612175548. The cubic root of 85210645 is about 440.0458715950.

The spelling of 85210645 in words is "eighty-five million, two hundred ten thousand, six hundred forty-five".