612128085 has 32 divisors (see below), whose sum is σ = 1019744640. Its totient is φ = 313168128.

The previous prime is 612128059. The next prime is 612128089. The reversal of 612128085 is 580821216.

612128085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612128085 - 2¹¹ = 612126037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612128089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63814 + ... + 72776.

It is an arithmetic number, because the mean of its divisors is an integer number (31867020).

Almost surely, 2^612128085 is an apocalyptic number.

It is an amenable number.

612128085 is a deficient number, since it is larger than the sum of its proper divisors (407616555).

612128085 is a wasteful number, since it uses less digits than its factorization.

612128085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 612128085 is about 24741.2223828977. Note that the first 3 decimals coincide. The cubic root of 612128085 is about 849.0777008829.

The spelling of 612128085 in words is "six hundred twelve million, one hundred twenty-eight thousand, eighty-five".