128015755 has 16 divisors (see below), whose sum is σ = 176230080. Its totient is φ = 87449472.

The previous prime is 128015753. The next prime is 128015801. The reversal of 128015755 is 557510821.

It is a cyclic number.

It is not a de Polignac number, because 128015755 - 2¹ = 128015753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128015755.

It is not an unprimeable number, because it can be changed into a prime (128015753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2617 + ... + 16213.

It is an arithmetic number, because the mean of its divisors is an integer number (11014380).

Almost surely, 2^128015755 is an apocalyptic number.

128015755 is a deficient number, since it is larger than the sum of its proper divisors (48214325).

128015755 is a wasteful number, since it uses less digits than its factorization.

128015755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13878.

The product of its (nonzero) digits is 14000, while the sum is 34.

The square root of 128015755 is about 11314.4047567691. The cubic root of 128015755 is about 503.9890962515.

The spelling of 128015755 in words is "one hundred twenty-eight million, fifteen thousand, seven hundred fifty-five".