43640432006 has 4 divisors (see below), whose sum is σ = 65460648012. Its totient is φ = 21820216002.

The previous prime is 43640431999. The next prime is 43640432027. The reversal of 43640432006 is 60023404634.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10910108000 + ... + 10910108003.

It is an arithmetic number, because the mean of its divisors is an integer number (16365162003).

Almost surely, 2^43640432006 is an apocalyptic number.

43640432006 is a deficient number, since it is larger than the sum of its proper divisors (21820216006).

43640432006 is a wasteful number, since it uses less digits than its factorization.

43640432006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21820216005.

The product of its (nonzero) digits is 41472, while the sum is 32.

The spelling of 43640432006 in words is "forty-three billion, six hundred forty million, four hundred thirty-two thousand, six".