43497944399 has 24 divisors (see below), whose sum is σ = 54542214720. Its totient is φ = 34384198464.

The previous prime is 43497944383. The next prime is 43497944401. The reversal of 43497944399 is 99344979434.

It is not a de Polignac number, because 43497944399 - 2⁴ = 43497944383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43497944309) 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 23 ways as a sum of consecutive naturals, for example, 671657 + ... + 733565.

It is an arithmetic number, because the mean of its divisors is an integer number (2272592280).

Almost surely, 2^43497944399 is an apocalyptic number.

43497944399 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

43497944399 is a deficient number, since it is larger than the sum of its proper divisors (11044270321).

43497944399 is a wasteful number, since it uses less digits than its factorization.

43497944399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63039 (or 63032 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 65.

The spelling of 43497944399 in words is "forty-three billion, four hundred ninety-seven million, nine hundred forty-four thousand, three hundred ninety-nine".