43166601643 has 4 divisors (see below), whose sum is σ = 47090838168. Its totient is φ = 39242365120.

The previous prime is 43166601617. The next prime is 43166601683. The reversal of 43166601643 is 34610666134.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43166601643 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 43166601596 and 43166601605.

It is not an unprimeable number, because it can be changed into a prime (43166601683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962118246 + ... + 1962118267.

It is an arithmetic number, because the mean of its divisors is an integer number (11772709542).

Almost surely, 2^43166601643 is an apocalyptic number.

43166601643 is a deficient number, since it is larger than the sum of its proper divisors (3924236525).

43166601643 is a wasteful number, since it uses less digits than its factorization.

43166601643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924236524.

The product of its (nonzero) digits is 186624, while the sum is 40.

It can be divided in two parts, 43166 and 601643, that added together give a square (644809 = 803²).

The spelling of 43166601643 in words is "forty-three billion, one hundred sixty-six million, six hundred one thousand, six hundred forty-three".