85865554252821 has 8 divisors (see below), whose sum is σ = 130842749337664. Its totient is φ = 49066031001600.

The previous prime is 85865554252783. The next prime is 85865554252837. The reversal of 85865554252821 is 12825245556858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85865554252821 - 2⁶ = 85865554252757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85865554251821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044417958380 + ... + 2044417958421.

It is an arithmetic number, because the mean of its divisors is an integer number (16355343667208).

Almost surely, 2^{85865554252821} is an apocalyptic number.

It is an amenable number.

85865554252821 is a deficient number, since it is larger than the sum of its proper divisors (44977195084843).

85865554252821 is a wasteful number, since it uses less digits than its factorization.

85865554252821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088835916811.

The product of its digits is 307200000, while the sum is 66.

The spelling of 85865554252821 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred fifty-four million, two hundred fifty-two thousand, eight hundred twenty-one".