128881844783334 has 40 divisors (see below), whose sum is σ = 288995762392920. Its totient is φ = 42930124706304.

The previous prime is 128881844783291. The next prime is 128881844783339. The reversal of 128881844783334 is 433387448188821.

128881844783334 is a `hidden beast` number, since 1 + 2 + 8 + 88 + 18 + 4 + 478 + 33 + 34 = 666.

It is a super-2 number, since 2×128881844783334² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128881844783339) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 282087904 + ... + 282544419.

It is an arithmetic number, because the mean of its divisors is an integer number (7224894059823).

Almost surely, 2^{128881844783334} is an apocalyptic number.

128881844783334 is an abundant number, since it is smaller than the sum of its proper divisors (160113917609586).

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

128881844783334 is a wasteful number, since it uses less digits than its factorization.

128881844783334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564633746 (or 564633737 counting only the distinct ones).

The product of its digits is 792723456, while the sum is 72.

The spelling of 128881844783334 in words is "one hundred twenty-eight trillion, eight hundred eighty-one billion, eight hundred forty-four million, seven hundred eighty-three thousand, three hundred thirty-four".