85836237646865 has 16 divisors (see below), whose sum is σ = 107144033003280. Its totient is φ = 65934789500160.

The previous prime is 85836237646837. The next prime is 85836237646927. The reversal of 85836237646865 is 56864673263858.

It can be written as a sum of positive squares in 8 ways, for example, as 22301373439489 + 63534864207376 = 4722433^2 + 7970876^2 .

It is not a de Polignac number, because 85836237646865 - 2³⁰ = 85835163905041 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1635261194 + ... + 1635313683.

It is an arithmetic number, because the mean of its divisors is an integer number (6696502062705).

Almost surely, 2^{85836237646865} is an apocalyptic number.

It is an amenable number.

85836237646865 is a deficient number, since it is larger than the sum of its proper divisors (21307795356415).

85836237646865 is a wasteful number, since it uses less digits than its factorization.

85836237646865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270575092.

The product of its digits is 8360755200, while the sum is 77.

The spelling of 85836237646865 in words is "eighty-five trillion, eight hundred thirty-six billion, two hundred thirty-seven million, six hundred forty-six thousand, eight hundred sixty-five".