128913422412820 has 48 divisors (see below), whose sum is σ = 280520464815360. Its totient is φ = 49728627801216.

The previous prime is 128913422412811. The next prime is 128913422412847. The reversal of 128913422412820 is 28214224319821.

It is a super-3 number, since 3×128913422412820³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948661987 + ... + 948797866.

It is an arithmetic number, because the mean of its divisors is an integer number (5844176350320).

Almost surely, 2^{128913422412820} is an apocalyptic number.

128913422412820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128913422412820 is an abundant number, since it is smaller than the sum of its proper divisors (151607042402540).

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

128913422412820 is a wasteful number, since it uses less digits than its factorization.

128913422412820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897459984 (or 1897459982 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 128913422412820 in words is "one hundred twenty-eight trillion, nine hundred thirteen billion, four hundred twenty-two million, four hundred twelve thousand, eight hundred twenty".