128954709555 has 16 divisors (see below), whose sum is σ = 235802897664. Its totient is φ = 58950724320.

The previous prime is 128954709511. The next prime is 128954709557. The reversal of 128954709555 is 555907459821.

It is not a de Polignac number, because 128954709555 - 2¹⁵ = 128954676787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128954709557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614069941 + ... + 614070150.

It is an arithmetic number, because the mean of its divisors is an integer number (14737681104).

Almost surely, 2^128954709555 is an apocalyptic number.

128954709555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128954709555 is a deficient number, since it is larger than the sum of its proper divisors (106848188109).

128954709555 is a wasteful number, since it uses less digits than its factorization.

128954709555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228140106.

The product of its (nonzero) digits is 22680000, while the sum is 60.

The spelling of 128954709555 in words is "one hundred twenty-eight billion, nine hundred fifty-four million, seven hundred nine thousand, five hundred fifty-five".