128194755 has 64 divisors (see below), whose sum is σ = 233597952. Its totient is φ = 59558400.

The previous prime is 128194753. The next prime is 128194763. The reversal of 128194755 is 557491821.

It is not a de Polignac number, because 128194755 - 2¹ = 128194753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128194753) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 452844 + ... + 453126.

It is an arithmetic number, because the mean of its divisors is an integer number (3649968).

Almost surely, 2^128194755 is an apocalyptic number.

128194755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128194755 is a deficient number, since it is larger than the sum of its proper divisors (105403197).

128194755 is a wasteful number, since it uses less digits than its factorization.

128194755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 100800, while the sum is 42.

The square root of 128194755 is about 11322.3122638443. The cubic root of 128194755 is about 504.2238903546.

The spelling of 128194755 in words is "one hundred twenty-eight million, one hundred ninety-four thousand, seven hundred fifty-five".