43913209649 has 8 divisors (see below), whose sum is σ = 44249081760. Its totient is φ = 43577560096.

The previous prime is 43913209607. The next prime is 43913209687. The reversal of 43913209649 is 94690231934.

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 43913209649 - 2²⁸ = 43644774193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43913209597 and 43913209606.

It is not an unprimeable number, because it can be changed into a prime (43913209699) 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, 351842 + ... + 460020.

It is an arithmetic number, because the mean of its divisors is an integer number (5531135220).

Almost surely, 2^43913209649 is an apocalyptic number.

It is an amenable number.

43913209649 is a deficient number, since it is larger than the sum of its proper divisors (335872111).

43913209649 is a wasteful number, since it uses less digits than its factorization.

43913209649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111279.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 43913209649 in words is "forty-three billion, nine hundred thirteen million, two hundred nine thousand, six hundred forty-nine".