43340020254640 has 20 divisors (see below), whose sum is σ = 100765547092224. Its totient is φ = 17336008101824.

The previous prime is 43340020254631. The next prime is 43340020254667. The reversal of 43340020254640 is 4645202004334.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 43340020254640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270875126512 + ... + 270875126671.

Almost surely, 2^{43340020254640} is an apocalyptic number.

43340020254640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43340020254640 is an abundant number, since it is smaller than the sum of its proper divisors (57425526837584).

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

43340020254640 is a wasteful number, since it uses less digits than its factorization.

43340020254640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541750253196 (or 541750253190 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 43340020254640 its reverse (4645202004334), we get a palindrome (47985222258974).

The spelling of 43340020254640 in words is "forty-three trillion, three hundred forty billion, twenty million, two hundred fifty-four thousand, six hundred forty".