43899454421985 has 16 divisors (see below), whose sum is σ = 70533014641920. Its totient is φ = 23315079836160.

The previous prime is 43899454421903. The next prime is 43899454422049. The reversal of 43899454421985 is 58912445499834.

It is a de Polignac number, because none of the positive numbers 2^k-43899454421985 is a prime.

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, 6122653936 + ... + 6122661105.

It is an arithmetic number, because the mean of its divisors is an integer number (4408313415120).

Almost surely, 2^{43899454421985} is an apocalyptic number.

It is an amenable number.

43899454421985 is a deficient number, since it is larger than the sum of its proper divisors (26633560219935).

43899454421985 is a wasteful number, since it uses less digits than its factorization.

43899454421985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12245315288.

The product of its digits is 1791590400, while the sum is 75.

The spelling of 43899454421985 in words is "forty-three trillion, eight hundred ninety-nine billion, four hundred fifty-four million, four hundred twenty-one thousand, nine hundred eighty-five".