128914881434 has 16 divisors (see below), whose sum is σ = 194462366280. Its totient is φ = 64094172480.

The previous prime is 128914881427. The next prime is 128914881461. The reversal of 128914881434 is 434188419821.

It can be written as a sum of positive squares in 4 ways, for example, as 108165343225 + 20749538209 = 328885^2 + 144047^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4935152 + ... + 4961204.

Almost surely, 2^128914881434 is an apocalyptic number.

128914881434 is a deficient number, since it is larger than the sum of its proper divisors (65547484846).

128914881434 is a wasteful number, since it uses less digits than its factorization.

128914881434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39905.

The product of its digits is 1769472, while the sum is 53.

The spelling of 128914881434 in words is "one hundred twenty-eight billion, nine hundred fourteen million, eight hundred eighty-one thousand, four hundred thirty-four".