86544448821681 has 4 divisors (see below), whose sum is σ = 115392598428912. Its totient is φ = 57696299214452.

The previous prime is 86544448821661. The next prime is 86544448821751. The reversal of 86544448821681 is 18612884444568.

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 86544448821681 - 2³⁴ = 86527268952497 is a prime.

It is a super-2 number, since 2×86544448821681² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86544448821661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14424074803611 + ... + 14424074803616.

It is an arithmetic number, because the mean of its divisors is an integer number (28848149607228).

Almost surely, 2^{86544448821681} is an apocalyptic number.

It is an amenable number.

86544448821681 is a deficient number, since it is larger than the sum of its proper divisors (28848149607231).

86544448821681 is a wasteful number, since it uses less digits than its factorization.

86544448821681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28848149607230.

The product of its digits is 377487360, while the sum is 69.

The spelling of 86544448821681 in words is "eighty-six trillion, five hundred forty-four billion, four hundred forty-eight million, eight hundred twenty-one thousand, six hundred eighty-one".