128280549818 has 16 divisors (see below), whose sum is σ = 197126806464. Its totient is φ = 62571817440.

The previous prime is 128280549811. The next prime is 128280549821. The reversal of 128280549818 is 818945082821.

It is not an unprimeable number, because it can be changed into a prime (128280549811) 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, 1512371 + ... + 1594937.

It is an arithmetic number, because the mean of its divisors is an integer number (12320425404).

Almost surely, 2^128280549818 is an apocalyptic number.

128280549818 is a deficient number, since it is larger than the sum of its proper divisors (68846256646).

128280549818 is a wasteful number, since it uses less digits than its factorization.

128280549818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101557.

The product of its (nonzero) digits is 2949120, while the sum is 56.

The spelling of 128280549818 in words is "one hundred twenty-eight billion, two hundred eighty million, five hundred forty-nine thousand, eight hundred eighteen".