42743081646 has 80 divisors (see below), whose sum is σ = 97273313280. Its totient is φ = 14026718160.

The previous prime is 42743081629. The next prime is 42743081683. The reversal of 42743081646 is 64618034724.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2687265 + ... + 2703123.

It is an arithmetic number, because the mean of its divisors is an integer number (1215916416).

Almost surely, 2^42743081646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42743081646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48636656640).

42743081646 is an abundant number, since it is smaller than the sum of its proper divisors (54530231634).

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

42743081646 is a wasteful number, since it uses less digits than its factorization.

42743081646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16131 (or 16122 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 42743081646 in words is "forty-two billion, seven hundred forty-three million, eighty-one thousand, six hundred forty-six".