43440861648 has 40 divisors (see below), whose sum is σ = 112639442400. Its totient is φ = 14426452864.

The previous prime is 43440861637. The next prime is 43440861649. The reversal of 43440861648 is 84616804434.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 43440861597 and 43440861606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43440861649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1669278 + ... + 1695101.

It is an arithmetic number, because the mean of its divisors is an integer number (2815986060).

Almost surely, 2^43440861648 is an apocalyptic number.

43440861648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

43440861648 is an abundant number, since it is smaller than the sum of its proper divisors (69198580752).

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

43440861648 is a wasteful number, since it uses less digits than its factorization.

43440861648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364659 (or 3364653 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 43440861648 in words is "forty-three billion, four hundred forty million, eight hundred sixty-one thousand, six hundred forty-eight".