128201441784 has 256 divisors, whose sum is σ = 362862218880. Its totient is φ = 37480734720.

The previous prime is 128201441761. The next prime is 128201441803. The reversal of 128201441784 is 487144102821.

It is a happy number.

It is a super-2 number, since 2×128201441784² (a number of 23 digits) contains 22 as substring.

It is a congruent 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, 193950414 + ... + 193951074.

Almost surely, 2^128201441784 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 128201441784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181431109440).

128201441784 is an abundant number, since it is smaller than the sum of its proper divisors (234660777096).

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

128201441784 is a wasteful number, since it uses less digits than its factorization.

128201441784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 42.

The spelling of 128201441784 in words is "one hundred twenty-eight billion, two hundred one million, four hundred forty-one thousand, seven hundred eighty-four".