128421285496 has 32 divisors (see below), whose sum is σ = 287153187840. Its totient is φ = 52644750048.

The previous prime is 128421285467. The next prime is 128421285497. The reversal of 128421285496 is 694582124821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128421285497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49851696 + ... + 49854271.

It is an arithmetic number, because the mean of its divisors is an integer number (8973537120).

Almost surely, 2^128421285496 is an apocalyptic number.

It is an amenable number.

128421285496 is an abundant number, since it is smaller than the sum of its proper divisors (158731902344).

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

128421285496 is a wasteful number, since it uses less digits than its factorization.

128421285496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99706003 (or 99705999 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 52.

The spelling of 128421285496 in words is "one hundred twenty-eight billion, four hundred twenty-one million, two hundred eighty-five thousand, four hundred ninety-six".