128954958219 has 24 divisors (see below), whose sum is σ = 188458395840. Its totient is φ = 84965043312.

The previous prime is 128954958193. The next prime is 128954958247. The reversal of 128954958219 is 912859459821.

128954958219 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 5 + 49 + 582 + 1 + 9 = 666.

It is not a de Polignac number, because 128954958219 - 2⁷ = 128954958091 is a prime.

It is a super-3 number, since 3×128954958219³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (128954918219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17052 + ... + 508134.

It is an arithmetic number, because the mean of its divisors is an integer number (7852433160).

Almost surely, 2^128954958219 is an apocalyptic number.

128954958219 is a deficient number, since it is larger than the sum of its proper divisors (59503437621).

128954958219 is a wasteful number, since it uses less digits than its factorization.

128954958219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491431 (or 491428 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 63.

The spelling of 128954958219 in words is "one hundred twenty-eight billion, nine hundred fifty-four million, nine hundred fifty-eight thousand, two hundred nineteen".