85565505 has 32 divisors (see below), whose sum is σ = 145563264. Its totient is φ = 42771456.

The previous prime is 85565489. The next prime is 85565527. The reversal of 85565505 is 50556558.

It is not a de Polignac number, because 85565505 - 2⁴ = 85565489 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77739 + ... + 78831.

It is an arithmetic number, because the mean of its divisors is an integer number (4548852).

Almost surely, 2^85565505 is an apocalyptic number.

85565505 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

85565505 is a deficient number, since it is larger than the sum of its proper divisors (59997759).

85565505 is a wasteful number, since it uses less digits than its factorization.

85565505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 150000, while the sum is 39.

The square root of 85565505 is about 9250.1624310063. The cubic root of 85565505 is about 440.6558830524.

The spelling of 85565505 in words is "eighty-five million, five hundred sixty-five thousand, five hundred five".