128585613 has 16 divisors (see below), whose sum is σ = 190593536. Its totient is φ = 76576320.

The previous prime is 128585599. The next prime is 128585627. The reversal of 128585613 is 316585821.

It is an interprime number because it is at equal distance from previous prime (128585599) and next prime (128585627).

It is not a de Polignac number, because 128585613 - 2¹² = 128581517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128585683) 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, 51970 + ... + 54387.

It is an arithmetic number, because the mean of its divisors is an integer number (11912096).

Almost surely, 2^128585613 is an apocalyptic number.

128585613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128585613 is a deficient number, since it is larger than the sum of its proper divisors (62007923).

128585613 is a wasteful number, since it uses less digits than its factorization.

128585613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106404.

The product of its digits is 57600, while the sum is 39.

The square root of 128585613 is about 11339.5596475348. The cubic root of 128585613 is about 504.7358197363.

The spelling of 128585613 in words is "one hundred twenty-eight million, five hundred eighty-five thousand, six hundred thirteen".