128462556185 has 4 divisors (see below), whose sum is σ = 154155067428. Its totient is φ = 102770044944.

The previous prime is 128462556179. The next prime is 128462556191. The reversal of 128462556185 is 581655264821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581655264821 = 67 ⋅8681421863.

It is an interprime number because it is at equal distance from previous prime (128462556179) and next prime (128462556191).

It can be written as a sum of positive squares in 2 ways, for example, as 36278059024 + 92184497161 = 190468^2 + 303619^2 .

It is a cyclic number.

It is not a de Polignac number, because 128462556185 - 2¹² = 128462552089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12846255614 + ... + 12846255623.

It is an arithmetic number, because the mean of its divisors is an integer number (38538766857).

Almost surely, 2^128462556185 is an apocalyptic number.

It is an amenable number.

128462556185 is a deficient number, since it is larger than the sum of its proper divisors (25692511243).

128462556185 is an equidigital number, since it uses as much as digits as its factorization.

128462556185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25692511242.

The product of its digits is 4608000, while the sum is 53.

The spelling of 128462556185 in words is "one hundred twenty-eight billion, four hundred sixty-two million, five hundred fifty-six thousand, one hundred eighty-five".