42078837217 has 8 divisors (see below), whose sum is σ = 44327848160. Its totient is φ = 39833259840.

The previous prime is 42078837197. The next prime is 42078837221. The reversal of 42078837217 is 71273887024.

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

It is not a de Polignac number, because 42078837217 - 2¹⁹ = 42078312929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42078837817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833208 + ... + 882265.

It is an arithmetic number, because the mean of its divisors is an integer number (5540981020).

Almost surely, 2^42078837217 is an apocalyptic number.

It is an amenable number.

42078837217 is a deficient number, since it is larger than the sum of its proper divisors (2249010943).

42078837217 is a wasteful number, since it uses less digits than its factorization.

42078837217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716783.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 42078837217 in words is "forty-two billion, seventy-eight million, eight hundred thirty-seven thousand, two hundred seventeen".