128381402534 has 32 divisors (see below), whose sum is σ = 240109270272. Its totient is φ = 50014692000.

The previous prime is 128381402531. The next prime is 128381402551. The reversal of 128381402534 is 435204183821.

128381402534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 128381402491 and 128381402500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128381402531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2497229 + ... + 2548119.

It is an arithmetic number, because the mean of its divisors is an integer number (7503414696).

Almost surely, 2^128381402534 is an apocalyptic number.

128381402534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128381402534 is a deficient number, since it is larger than the sum of its proper divisors (111727867738).

128381402534 is a wasteful number, since it uses less digits than its factorization.

128381402534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67292.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 128381402534 in words is "one hundred twenty-eight billion, three hundred eighty-one million, four hundred two thousand, five hundred thirty-four".