85236218397 has 72 divisors (see below), whose sum is σ = 142672875072. Its totient is φ = 48901501440.

The previous prime is 85236218387. The next prime is 85236218413. The reversal of 85236218397 is 79381263258.

85236218397 is a `hidden beast` number, since 8 + 5 + 2 + 3 + 621 + 8 + 3 + 9 + 7 = 666.

It is not a de Polignac number, because 85236218397 - 2⁸ = 85236218141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85236218387) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2412018 + ... + 2447100.

Almost surely, 2^85236218397 is an apocalyptic number.

It is an amenable number.

85236218397 is a deficient number, since it is larger than the sum of its proper divisors (57436656675).

85236218397 is a wasteful number, since it uses less digits than its factorization.

85236218397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35231 (or 35217 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 85236218397 in words is "eighty-five billion, two hundred thirty-six million, two hundred eighteen thousand, three hundred ninety-seven".