128420452632 has 32 divisors (see below), whose sum is σ = 327882009600. Its totient is φ = 41896033824.

The previous prime is 128420452631. The next prime is 128420452649. The reversal of 128420452632 is 236254024821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128420452631) 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, 56922832 + ... + 56925087.

It is an arithmetic number, because the mean of its divisors is an integer number (10246312800).

Almost surely, 2^128420452632 is an apocalyptic number.

128420452632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128420452632 is an abundant number, since it is smaller than the sum of its proper divisors (199461556968).

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

128420452632 is a wasteful number, since it uses less digits than its factorization.

128420452632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113847975 (or 113847971 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 128420452632 in words is "one hundred twenty-eight billion, four hundred twenty million, four hundred fifty-two thousand, six hundred thirty-two".