43606665642 has 16 divisors (see below), whose sum is σ = 87239335680. Its totient is φ = 14531221152.

The previous prime is 43606665589. The next prime is 43606665667. The reversal of 43606665642 is 24656660634.

It is a junction number, because it is equal to n+sod(n) for n = 43606665591 and 43606665600.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1061683 + ... + 1101990.

It is an arithmetic number, because the mean of its divisors is an integer number (5452458480).

Almost surely, 2^43606665642 is an apocalyptic number.

43606665642 is an abundant number, since it is smaller than the sum of its proper divisors (43632670038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43606665642 is a wasteful number, since it uses less digits than its factorization.

43606665642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167037.

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 43606665642 in words is "forty-three billion, six hundred six million, six hundred sixty-five thousand, six hundred forty-two".