85236555748821 has 4 divisors (see below), whose sum is σ = 113648740998432. Its totient is φ = 56824370499212.

The previous prime is 85236555748789. The next prime is 85236555748829. The reversal of 85236555748821 is 12884755563258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85236555748821 - 2⁵ = 85236555748789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85236555748829) 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 3 ways as a sum of consecutive naturals, for example, 14206092624801 + ... + 14206092624806.

It is an arithmetic number, because the mean of its divisors is an integer number (28412185249608).

Almost surely, 2^{85236555748821} is an apocalyptic number.

It is an amenable number.

85236555748821 is a deficient number, since it is larger than the sum of its proper divisors (28412185249611).

85236555748821 is a wasteful number, since it uses less digits than its factorization.

85236555748821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28412185249610.

The product of its digits is 645120000, while the sum is 69.

The spelling of 85236555748821 in words is "eighty-five trillion, two hundred thirty-six billion, five hundred fifty-five million, seven hundred forty-eight thousand, eight hundred twenty-one".