128934815835 has 32 divisors (see below), whose sum is σ = 238100861952. Its totient is φ = 58358044800.

The previous prime is 128934815831. The next prime is 128934815837. The reversal of 128934815835 is 538518439821.

It is not a de Polignac number, because 128934815835 - 2² = 128934815831 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128934815831) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6068359 + ... + 6089568.

It is an arithmetic number, because the mean of its divisors is an integer number (7440651936).

Almost surely, 2^128934815835 is an apocalyptic number.

128934815835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128934815835 is a deficient number, since it is larger than the sum of its proper divisors (109166046117).

128934815835 is a wasteful number, since it uses less digits than its factorization.

128934815835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12158043.

The product of its digits is 8294400, while the sum is 57.

The spelling of 128934815835 in words is "one hundred twenty-eight billion, nine hundred thirty-four million, eight hundred fifteen thousand, eight hundred thirty-five".