128985793848 has 144 divisors (see below), whose sum is σ = 382347627480. Its totient is φ = 40732134336.

The previous prime is 128985793843. The next prime is 128985793861. The reversal of 128985793848 is 848397589821.

128985793848 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 8 + 579 + 3 + 8 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128985793843) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 609886 + ... + 793682.

Almost surely, 2^128985793848 is an apocalyptic number.

128985793848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128985793848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191173813740).

128985793848 is an abundant number, since it is smaller than the sum of its proper divisors (253361833632).

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

128985793848 is a wasteful number, since it uses less digits than its factorization.

128985793848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183856 (or 183821 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 72.

The spelling of 128985793848 in words is "one hundred twenty-eight billion, nine hundred eighty-five million, seven hundred ninety-three thousand, eight hundred forty-eight".