42078321117 has 12 divisors (see below), whose sum is σ = 69462625440. Its totient is φ = 24044754888.

The previous prime is 42078321113. The next prime is 42078321121. The reversal of 42078321117 is 71112387024.

42078321117 is a `hidden beast` number, since 420 + 7 + 8 + 3 + 211 + 17 = 666.

It is an interprime number because it is at equal distance from previous prime (42078321113) and next prime (42078321121).

It is not a de Polignac number, because 42078321117 - 2² = 42078321113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078321113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333954867 + ... + 333954992.

It is an arithmetic number, because the mean of its divisors is an integer number (5788552120).

Almost surely, 2^42078321117 is an apocalyptic number.

It is an amenable number.

42078321117 is a deficient number, since it is larger than the sum of its proper divisors (27384304323).

42078321117 is a wasteful number, since it uses less digits than its factorization.

42078321117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667909872 (or 667909869 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 42078321117 in words is "forty-two billion, seventy-eight million, three hundred twenty-one thousand, one hundred seventeen".