128854994508 has 24 divisors (see below), whose sum is σ = 334068504560. Its totient is φ = 42951664800.

The previous prime is 128854994473. The next prime is 128854994519. The reversal of 128854994508 is 805499458821.

128854994508 is a `hidden beast` number, since 1 + 2 + 8 + 85 + 49 + 9 + 4 + 508 = 666.

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, 596550793 + ... + 596551008.

Almost surely, 2^128854994508 is an apocalyptic number.

128854994508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128854994508 is an abundant number, since it is smaller than the sum of its proper divisors (205213510052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128854994508 is a wasteful number, since it uses less digits than its factorization.

128854994508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193101814 (or 1193101806 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 63.

The spelling of 128854994508 in words is "one hundred twenty-eight billion, eight hundred fifty-four million, nine hundred ninety-four thousand, five hundred eight".