43173340661 has 8 divisors (see below), whose sum is σ = 47103670848. Its totient is φ = 39243924000.

The previous prime is 43173340643. The next prime is 43173340799. The reversal of 43173340661 is 16604337134.

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

It is a cyclic number.

It is not a de Polignac number, because 43173340661 - 2²⁶ = 43106231797 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 (43173340631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127625 + ... + 320366.

It is an arithmetic number, because the mean of its divisors is an integer number (5887958856).

Almost surely, 2^43173340661 is an apocalyptic number.

It is an amenable number.

43173340661 is a deficient number, since it is larger than the sum of its proper divisors (3930330187).

43173340661 is a wasteful number, since it uses less digits than its factorization.

43173340661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456763.

The product of its (nonzero) digits is 108864, while the sum is 38.

Adding to 43173340661 its reverse (16604337134), we get a palindrome (59777677795).

The spelling of 43173340661 in words is "forty-three billion, one hundred seventy-three million, three hundred forty thousand, six hundred sixty-one".