85655775 has 24 divisors (see below), whose sum is σ = 149950224. Its totient is φ = 42995200.

The previous prime is 85655771. The next prime is 85655789. The reversal of 85655775 is 57755658.

It is not a de Polignac number, because 85655775 - 2² = 85655771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85655771) 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 23 ways as a sum of consecutive naturals, for example, 32316 + ... + 34865.

It is an arithmetic number, because the mean of its divisors is an integer number (6247926).

Almost surely, 2^85655775 is an apocalyptic number.

85655775 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

85655775 is a deficient number, since it is larger than the sum of its proper divisors (64294449).

85655775 is a wasteful number, since it uses less digits than its factorization.

85655775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67211 (or 67206 counting only the distinct ones).

The product of its digits is 1470000, while the sum is 48.

The square root of 85655775 is about 9255.0405185499. The cubic root of 85655775 is about 440.8107898162.

The spelling of 85655775 in words is "eighty-five million, six hundred fifty-five thousand, seven hundred seventy-five".