128239155396 has 384 divisors, whose sum is σ = 393094840320. Its totient is φ = 35761651200.

The previous prime is 128239155367. The next prime is 128239155397. The reversal of 128239155396 is 693551932821.

128239155396 is a `hidden beast` number, since 1 + 2 + 8 + 239 + 15 + 5 + 396 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (128239155397) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 78337090 + ... + 78338726.

It is an arithmetic number, because the mean of its divisors is an integer number (1023684480).

Almost surely, 2^128239155396 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 128239155396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196547420160).

128239155396 is an abundant number, since it is smaller than the sum of its proper divisors (264855684924).

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

128239155396 is a wasteful number, since it uses less digits than its factorization.

128239155396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792 (or 1784 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The spelling of 128239155396 in words is "one hundred twenty-eight billion, two hundred thirty-nine million, one hundred fifty-five thousand, three hundred ninety-six".