43686454421165 has 8 divisors (see below), whose sum is σ = 53702373239928. Its totient is φ = 34096744913920.

The previous prime is 43686454421119. The next prime is 43686454421167. The reversal of 43686454421165 is 56112445468634.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3789520195561 + 39896934225604 = 1946669^2 + 6316402^2 .

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

It is not a de Polignac number, because 43686454421165 - 2³² = 43682159453869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43686454421167) 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, 106552327652 + ... + 106552328061.

It is an arithmetic number, because the mean of its divisors is an integer number (6712796654991).

Almost surely, 2^{43686454421165} is an apocalyptic number.

It is an amenable number.

43686454421165 is a deficient number, since it is larger than the sum of its proper divisors (10015918818763).

43686454421165 is a wasteful number, since it uses less digits than its factorization.

43686454421165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213104655759.

The product of its digits is 66355200, while the sum is 59.

Adding to 43686454421165 its reverse (56112445468634), we get a palindrome (99798899889799).

The spelling of 43686454421165 in words is "forty-three trillion, six hundred eighty-six billion, four hundred fifty-four million, four hundred twenty-one thousand, one hundred sixty-five".