128568385177 has 8 divisors (see below), whose sum is σ = 132077908872. Its totient is φ = 125060688000.

The previous prime is 128568385171. The next prime is 128568385189. The reversal of 128568385177 is 771583865821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88297528201 + 40270856976 = 297149^2 + 200676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128568385177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128568385171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313324 + ... + 596077.

It is an arithmetic number, because the mean of its divisors is an integer number (16509738609).

Almost surely, 2^128568385177 is an apocalyptic number.

It is an amenable number.

128568385177 is a deficient number, since it is larger than the sum of its proper divisors (3509523695).

128568385177 is an equidigital number, since it uses as much as digits as its factorization.

128568385177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913259.

The product of its digits is 22579200, while the sum is 61.

The spelling of 128568385177 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, three hundred eighty-five thousand, one hundred seventy-seven".