85578005 has 4 divisors (see below), whose sum is σ = 102693612. Its totient is φ = 68462400.

The previous prime is 85577993. The next prime is 85578019. The reversal of 85578005 is 50087558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50087558 = 2 ⋅25043779.

It can be written as a sum of positive squares in 2 ways, for example, as 48135844 + 37442161 = 6938^2 + 6119^2 .

It is not a de Polignac number, because 85578005 - 2⁸ = 85577749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85578005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8557796 + ... + 8557805.

It is an arithmetic number, because the mean of its divisors is an integer number (25673403).

Almost surely, 2^85578005 is an apocalyptic number.

It is an amenable number.

85578005 is a deficient number, since it is larger than the sum of its proper divisors (17115607).

85578005 is a wasteful number, since it uses less digits than its factorization.

85578005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17115606.

The product of its (nonzero) digits is 56000, while the sum is 38.

The square root of 85578005 is about 9250.8380701426. The cubic root of 85578005 is about 440.6773400260.

The spelling of 85578005 in words is "eighty-five million, five hundred seventy-eight thousand, five".