128987425455834 has 128 divisors (see below), whose sum is σ = 284614311168000. Its totient is φ = 38647113880320.

The previous prime is 128987425455781. The next prime is 128987425455943. The reversal of 128987425455834 is 438554524789821.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5096491572 + ... + 5096516880.

It is an arithmetic number, because the mean of its divisors is an integer number (2223549306000).

Almost surely, 2^{128987425455834} is an apocalyptic number.

128987425455834 is an abundant number, since it is smaller than the sum of its proper divisors (155626885712166).

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

128987425455834 is a wasteful number, since it uses less digits than its factorization.

128987425455834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27940.

The product of its digits is 3096576000, while the sum is 75.

The spelling of 128987425455834 in words is "one hundred twenty-eight trillion, nine hundred eighty-seven billion, four hundred twenty-five million, four hundred fifty-five thousand, eight hundred thirty-four".