42879638638 has 8 divisors (see below), whose sum is σ = 64320449760. Its totient is φ = 21439488720.

The previous prime is 42879638621. The next prime is 42879638671. The reversal of 42879638638 is 83683697824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42879638638.

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 3 ways as a sum of consecutive naturals, for example, 56178 + ... + 298186.

It is an arithmetic number, because the mean of its divisors is an integer number (8040056220).

Almost surely, 2^42879638638 is an apocalyptic number.

42879638638 is a deficient number, since it is larger than the sum of its proper divisors (21440811122).

42879638638 is a wasteful number, since it uses less digits than its factorization.

42879638638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330602.

The product of its digits is 83607552, while the sum is 64.

The spelling of 42879638638 in words is "forty-two billion, eight hundred seventy-nine million, six hundred thirty-eight thousand, six hundred thirty-eight".