128928961596840 has 128 divisors (see below), whose sum is σ = 423661091040000. Its totient is φ = 31242826108928.

The previous prime is 128928961596833. The next prime is 128928961596863. The reversal of 128928961596840 is 48695169829821.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1089604140 + ... + 1089722459.

It is an arithmetic number, because the mean of its divisors is an integer number (3309852273750).

Almost surely, 2^{128928961596840} is an apocalyptic number.

128928961596840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128928961596840 is an abundant number, since it is smaller than the sum of its proper divisors (294732129443160).

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

128928961596840 is a wasteful number, since it uses less digits than its factorization.

128928961596840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179326659 (or 2179326655 counting only the distinct ones).

The product of its (nonzero) digits is 1074954240, while the sum is 78.

The spelling of 128928961596840 in words is "one hundred twenty-eight trillion, nine hundred twenty-eight billion, nine hundred sixty-one million, five hundred ninety-six thousand, eight hundred forty".