42568839864 has 144 divisors (see below), whose sum is σ = 121935925800. Its totient is φ = 13414301568.

The previous prime is 42568839853. The next prime is 42568839881. The reversal of 42568839864 is 46893886524.

42568839864 is a `hidden beast` number, since 4 + 2 + 568 + 8 + 3 + 9 + 8 + 64 = 666.

It is a super-2 number, since 2×42568839864² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 14632042 + ... + 14634950.

Almost surely, 2^42568839864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42568839864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60967962900).

42568839864 is an abundant number, since it is smaller than the sum of its proper divisors (79367085936).

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

42568839864 is a wasteful number, since it uses less digits than its factorization.

42568839864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3496 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 63.

The spelling of 42568839864 in words is "forty-two billion, five hundred sixty-eight million, eight hundred thirty-nine thousand, eight hundred sixty-four".