4278520307568 has 80 divisors (see below), whose sum is σ = 12127649093280. Its totient is φ = 1291628762112.

The previous prime is 4278520307561. The next prime is 4278520307569. The reversal of 4278520307568 is 8657030258724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278520307561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64651863 + ... + 64718006.

It is an arithmetic number, because the mean of its divisors is an integer number (151595613666).

Almost surely, 2^{4278520307568} is an apocalyptic number.

4278520307568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4278520307568 is an abundant number, since it is smaller than the sum of its proper divisors (7849128785712).

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

4278520307568 is a wasteful number, since it uses less digits than its factorization.

4278520307568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129369946 (or 129369940 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 57.

The spelling of 4278520307568 in words is "four trillion, two hundred seventy-eight billion, five hundred twenty million, three hundred seven thousand, five hundred sixty-eight".