128616485 has 8 divisors (see below), whose sum is σ = 154402200. Its totient is φ = 102851584.

The previous prime is 128616463. The next prime is 128616493. The reversal of 128616485 is 584616821.

It can be written as a sum of positive squares in 4 ways, for example, as 3556996 + 125059489 = 1886^2 + 11183^2 .

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-128616485 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17069 + ... + 23421.

It is an arithmetic number, because the mean of its divisors is an integer number (19300275).

Almost surely, 2^128616485 is an apocalyptic number.

It is an amenable number.

128616485 is a deficient number, since it is larger than the sum of its proper divisors (25785715).

128616485 is an equidigital number, since it uses as much as digits as its factorization.

128616485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10407.

The product of its digits is 92160, while the sum is 41.

The square root of 128616485 is about 11340.9208179936. The cubic root of 128616485 is about 504.7762103549.

It can be divided in two parts, 1286 and 16485, that added together give a palindrome (17771).

The spelling of 128616485 in words is "one hundred twenty-eight million, six hundred sixteen thousand, four hundred eighty-five".