85806899655 has 32 divisors (see below), whose sum is σ = 142454231040. Its totient is φ = 44057917440.

The previous prime is 85806899653. The next prime is 85806899657. The reversal of 85806899655 is 55699860858.

It is an interprime number because it is at equal distance from previous prime (85806899653) and next prime (85806899657).

It is not a de Polignac number, because 85806899655 - 2¹ = 85806899653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85806899655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85806899653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388315 + ... + 567804.

It is an arithmetic number, because the mean of its divisors is an integer number (4451694720).

Almost surely, 2^85806899655 is an apocalyptic number.

85806899655 is a deficient number, since it is larger than the sum of its proper divisors (56647331385).

85806899655 is a wasteful number, since it uses less digits than its factorization.

85806899655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956351.

The product of its (nonzero) digits is 186624000, while the sum is 69.

The spelling of 85806899655 in words is "eighty-five billion, eight hundred six million, eight hundred ninety-nine thousand, six hundred fifty-five".