85636419 has 24 divisors (see below), whose sum is σ = 126115920. Its totient is φ = 51648960.

The previous prime is 85636417. The next prime is 85636427. The reversal of 85636419 is 91463658.

It is not a de Polignac number, because 85636419 - 2¹ = 85636417 is a prime.

It is a super-2 number, since 2×85636419² = 14667192518287122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85636417) 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, 97209 + ... + 98085.

It is an arithmetic number, because the mean of its divisors is an integer number (5254830).

Almost surely, 2^85636419 is an apocalyptic number.

85636419 is a deficient number, since it is larger than the sum of its proper divisors (40479501).

85636419 is a wasteful number, since it uses less digits than its factorization.

85636419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1160 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 85636419 is about 9253.9947590216. The cubic root of 85636419 is about 440.7775833514. Note that the first 3 decimals are identical.

The spelling of 85636419 in words is "eighty-five million, six hundred thirty-six thousand, four hundred nineteen".