86641431644441 has 4 divisors (see below), whose sum is σ = 88656348659472. Its totient is φ = 84626514629412.

The previous prime is 86641431644407. The next prime is 86641431644459. The reversal of 86641431644441 is 14444613414668.

It is a happy number.

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 86641431644441 - 2³⁰ = 86640357902617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86641431644641) 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, 1007458507451 + ... + 1007458507536.

It is an arithmetic number, because the mean of its divisors is an integer number (22164087164868).

Almost surely, 2^{86641431644441} is an apocalyptic number.

It is an amenable number.

86641431644441 is a deficient number, since it is larger than the sum of its proper divisors (2014917015031).

86641431644441 is a wasteful number, since it uses less digits than its factorization.

86641431644441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014917015030.

The product of its digits is 21233664, while the sum is 56.

The spelling of 86641431644441 in words is "eighty-six trillion, six hundred forty-one billion, four hundred thirty-one million, six hundred forty-four thousand, four hundred forty-one".