42858985779 has 12 divisors (see below), whose sum is σ = 63580598016. Its totient is φ = 27800422992.

The previous prime is 42858985751. The next prime is 42858985781. The reversal of 42858985779 is 97758985824.

42858985779 is a `hidden beast` number, since 42 + 8 + 5 + 8 + 9 + 8 + 577 + 9 = 666.

It is not a de Polignac number, because 42858985779 - 2¹¹ = 42858983731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42858985789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64352499 + ... + 64353164.

It is an arithmetic number, because the mean of its divisors is an integer number (5298383168).

Almost surely, 2^42858985779 is an apocalyptic number.

42858985779 is a deficient number, since it is larger than the sum of its proper divisors (20721612237).

42858985779 is a wasteful number, since it uses less digits than its factorization.

42858985779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128705706 (or 128705703 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 72.

The spelling of 42858985779 in words is "forty-two billion, eight hundred fifty-eight million, nine hundred eighty-five thousand, seven hundred seventy-nine".