128197439452 has 24 divisors (see below), whose sum is σ = 227605427280. Its totient is φ = 63172010880.

The previous prime is 128197439431. The next prime is 128197439459. The reversal of 128197439452 is 254934791821.

It is a junction number, because it is equal to n+sod(n) for n = 128197439393 and 128197439402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128197439459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477199 + ... + 695782.

It is an arithmetic number, because the mean of its divisors is an integer number (9483559470).

Almost surely, 2^128197439452 is an apocalyptic number.

It is an amenable number.

128197439452 is a deficient number, since it is larger than the sum of its proper divisors (99407987828).

128197439452 is a wasteful number, since it uses less digits than its factorization.

128197439452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173381 (or 1173379 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The spelling of 128197439452 in words is "one hundred twenty-eight billion, one hundred ninety-seven million, four hundred thirty-nine thousand, four hundred fifty-two".