4278538261128 has 32 divisors (see below), whose sum is σ = 10698646716000. Its totient is φ = 1425872611968.

The previous prime is 4278538261093. The next prime is 4278538261147. The reversal of 4278538261128 is 8211628358724.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19061626 + ... + 19284777.

It is an arithmetic number, because the mean of its divisors is an integer number (334332709875).

Almost surely, 2^{4278538261128} is an apocalyptic number.

It is an amenable number.

4278538261128 is an abundant number, since it is smaller than the sum of its proper divisors (6420108454872).

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

4278538261128 is a wasteful number, since it uses less digits than its factorization.

4278538261128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38351061 (or 38351057 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 57.

The spelling of 4278538261128 in words is "four trillion, two hundred seventy-eight billion, five hundred thirty-eight million, two hundred sixty-one thousand, one hundred twenty-eight".