866441573141231 has 4 divisors (see below), whose sum is σ = 877409187991200. Its totient is φ = 855473958291264.

The previous prime is 866441573141227. The next prime is 866441573141251. The reversal of 866441573141231 is 132141375144668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866441573141231 - 2² = 866441573141227 is a prime.

It is a super-2 number, since 2×866441573141231² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866441573141251) 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, 5483807424866 + ... + 5483807425023.

It is an arithmetic number, because the mean of its divisors is an integer number (219352296997800).

Almost surely, 2^{866441573141231} is an apocalyptic number.

866441573141231 is a deficient number, since it is larger than the sum of its proper divisors (10967614849969).

866441573141231 is a wasteful number, since it uses less digits than its factorization.

866441573141231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10967614849968.

The product of its digits is 11612160, while the sum is 56.

The spelling of 866441573141231 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, five hundred seventy-three million, one hundred forty-one thousand, two hundred thirty-one".