4278538073128 has 64 divisors (see below), whose sum is σ = 9270194169600. Its totient is φ = 1829631774720.

The previous prime is 4278538073119. The next prime is 4278538073129. The reversal of 4278538073128 is 8213708358724.

It is not an unprimeable number, because it can be changed into a prime (4278538073129) 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, 3024193 + ... + 4207471.

It is an arithmetic number, because the mean of its divisors is an integer number (144846783900).

Almost surely, 2^{4278538073128} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4278538073128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4635097084800).

4278538073128 is an abundant number, since it is smaller than the sum of its proper divisors (4991656096472).

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

4278538073128 is a wasteful number, since it uses less digits than its factorization.

4278538073128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185730 (or 1185726 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 58.

The spelling of 4278538073128 in words is "four trillion, two hundred seventy-eight billion, five hundred thirty-eight million, seventy-three thousand, one hundred twenty-eight".