43509209848685 has 16 divisors (see below), whose sum is σ = 61282470089856. Its totient is φ = 29028538461888.

The previous prime is 43509209848661. The next prime is 43509209848711. The reversal of 43509209848685 is 58684890290534.

It is not a de Polignac number, because 43509209848685 - 2¹⁸ = 43509209586541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16798921427 + ... + 16798924016.

It is an arithmetic number, because the mean of its divisors is an integer number (3830154380616).

Almost surely, 2^{43509209848685} is an apocalyptic number.

It is an amenable number.

43509209848685 is a deficient number, since it is larger than the sum of its proper divisors (17773260241171).

43509209848685 is a wasteful number, since it uses less digits than its factorization.

43509209848685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33597845492.

The product of its (nonzero) digits is 597196800, while the sum is 71.

The spelling of 43509209848685 in words is "forty-three trillion, five hundred nine billion, two hundred nine million, eight hundred forty-eight thousand, six hundred eighty-five".