42991854728 has 32 divisors (see below), whose sum is σ = 81469488960. Its totient is φ = 21266980800.

The previous prime is 42991854671. The next prime is 42991854749. The reversal of 42991854728 is 82745819924.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085075 + ... + 1123997.

It is an arithmetic number, because the mean of its divisors is an integer number (2545921530).

Almost surely, 2^42991854728 is an apocalyptic number.

It is an amenable number.

42991854728 is a deficient number, since it is larger than the sum of its proper divisors (38477634232).

42991854728 is a wasteful number, since it uses less digits than its factorization.

42991854728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40397 (or 40393 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 59.

The spelling of 42991854728 in words is "forty-two billion, nine hundred ninety-one million, eight hundred fifty-four thousand, seven hundred twenty-eight".