4278538431872 has 32 divisors (see below), whose sum is σ = 8684474395680. Its totient is φ = 2098905642496.

The previous prime is 4278538431829. The next prime is 4278538431907. The reversal of 4278538431872 is 2781348358724.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×4278538431872² (a number of 26 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 3 ways as a sum of consecutive naturals, for example, 315333608 + ... + 315347175.

It is an arithmetic number, because the mean of its divisors is an integer number (271389824865).

Almost surely, 2^{4278538431872} is an apocalyptic number.

It is an amenable number.

4278538431872 is an abundant number, since it is smaller than the sum of its proper divisors (4405935963808).

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

4278538431872 is an equidigital number, since it uses as much as digits as its factorization.

4278538431872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630680850 (or 630680838 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 62.

The spelling of 4278538431872 in words is "four trillion, two hundred seventy-eight billion, five hundred thirty-eight million, four hundred thirty-one thousand, eight hundred seventy-two".