128919489099 has 8 divisors (see below), whose sum is σ = 171895499472. Its totient is φ = 85944902400.

The previous prime is 128919489007. The next prime is 128919489109. The reversal of 128919489099 is 990984919821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128919489099 - 2¹¹ = 128919487051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128919489199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122814 + ... + 522419.

It is an arithmetic number, because the mean of its divisors is an integer number (21486937434).

Almost surely, 2^128919489099 is an apocalyptic number.

128919489099 is a deficient number, since it is larger than the sum of its proper divisors (42976010373).

128919489099 is an equidigital number, since it uses as much as digits as its factorization.

128919489099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711837.

The product of its (nonzero) digits is 30233088, while the sum is 69.

The spelling of 128919489099 in words is "one hundred twenty-eight billion, nine hundred nineteen million, four hundred eighty-nine thousand, ninety-nine".