128301655 has 16 divisors (see below), whose sum is σ = 159628320. Its totient is φ = 98879872.

The previous prime is 128301647. The next prime is 128301671. The reversal of 128301655 is 556103821.

128301655 = 51² + 52² + ... + 727².

It is a cyclic number.

It is not a de Polignac number, because 128301655 - 2³ = 128301647 is a prime.

It is a super-2 number, since 2×128301655² = 32922629351478050, which contains 22 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97512 + ... + 98818.

It is an arithmetic number, because the mean of its divisors is an integer number (9976770).

Almost surely, 2^128301655 is an apocalyptic number.

128301655 is a deficient number, since it is larger than the sum of its proper divisors (31326665).

128301655 is a wasteful number, since it uses less digits than its factorization.

128301655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 128301655 is about 11327.0320472752. The cubic root of 128301655 is about 504.3640067429.

The spelling of 128301655 in words is "one hundred twenty-eight million, three hundred one thousand, six hundred fifty-five".