128277828646551 has 24 divisors (see below), whose sum is σ = 192950111418064. Its totient is φ = 85163703626880.

The previous prime is 128277828646453. The next prime is 128277828646619. The reversal of 128277828646551 is 155646828772821.

128277828646551 is a `hidden beast` number, since 1 + 2 + 8 + 2 + 7 + 7 + 8 + 2 + 8 + 64 + 6 + 551 = 666.

It is not a de Polignac number, because 128277828646551 - 2⁷ = 128277828646423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128277828646551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128277828641551) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1095153676 + ... + 1095270801.

Almost surely, 2^{128277828646551} is an apocalyptic number.

128277828646551 is a deficient number, since it is larger than the sum of its proper divisors (64672282771513).

128277828646551 is an equidigital number, since it uses as much as digits as its factorization.

128277828646551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190424733 (or 2190424721 counting only the distinct ones).

The product of its digits is 722534400, while the sum is 72.

The spelling of 128277828646551 in words is "one hundred twenty-eight trillion, two hundred seventy-seven billion, eight hundred twenty-eight million, six hundred forty-six thousand, five hundred fifty-one".