42785021816 has 32 divisors (see below), whose sum is σ = 80709108480. Its totient is φ = 21262723200.

The previous prime is 42785021761. The next prime is 42785021821. The reversal of 42785021816 is 61812058724.

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 7 ways as a sum of consecutive naturals, for example, 3049730 + ... + 3063726.

It is an arithmetic number, because the mean of its divisors is an integer number (2522159640).

Almost surely, 2^42785021816 is an apocalyptic number.

It is an amenable number.

42785021816 is a deficient number, since it is larger than the sum of its proper divisors (37924086664).

42785021816 is a wasteful number, since it uses less digits than its factorization.

42785021816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16295 (or 16291 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 42785021816 in words is "forty-two billion, seven hundred eighty-five million, twenty-one thousand, eight hundred sixteen".