128798155472 has 120 divisors (see below), whose sum is σ = 302052542400. Its totient is φ = 51974313984.

The previous prime is 128798155459. The next prime is 128798155477. The reversal of 128798155472 is 274551897821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128798155477) 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, 68182304 + ... + 68184192.

It is an arithmetic number, because the mean of its divisors is an integer number (2517104520).

Almost surely, 2^128798155472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128798155472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151026271200).

128798155472 is an abundant number, since it is smaller than the sum of its proper divisors (173254386928).

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

128798155472 is a wasteful number, since it uses less digits than its factorization.

128798155472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281 (or 2096 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 59.

The spelling of 128798155472 in words is "one hundred twenty-eight billion, seven hundred ninety-eight million, one hundred fifty-five thousand, four hundred seventy-two".