128100533640 has 64 divisors (see below), whose sum is σ = 385177161600. Its totient is φ = 34082314752.

The previous prime is 128100533573. The next prime is 128100533651. The reversal of 128100533640 is 46335001821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1163157 + ... + 1268516.

It is an arithmetic number, because the mean of its divisors is an integer number (6018393150).

Almost surely, 2^128100533640 is an apocalyptic number.

128100533640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128100533640 is an abundant number, since it is smaller than the sum of its proper divisors (257076627960).

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

128100533640 is a wasteful number, since it uses less digits than its factorization.

128100533640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432126 (or 2432122 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 128100533640 in words is "one hundred twenty-eight billion, one hundred million, five hundred thirty-three thousand, six hundred forty".