128916551628 has 36 divisors (see below), whose sum is σ = 337109376240. Its totient is φ = 41490384096.

The previous prime is 128916551611. The next prime is 128916551689. The reversal of 128916551628 is 826155619821.

128916551628 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 1 + 6 + 5 + 5 + 1 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 61740600 + ... + 61742687.

It is an arithmetic number, because the mean of its divisors is an integer number (9364149340).

Almost surely, 2^128916551628 is an apocalyptic number.

128916551628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128916551628 is an abundant number, since it is smaller than the sum of its proper divisors (208192824612).

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

128916551628 is a wasteful number, since it uses less digits than its factorization.

128916551628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123483326 (or 123483321 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

The spelling of 128916551628 in words is "one hundred twenty-eight billion, nine hundred sixteen million, five hundred fifty-one thousand, six hundred twenty-eight".