4085505257 has 16 divisors (see below), whose sum is σ = 4223107200. Its totient is φ = 3949440768.

The previous prime is 4085505233. The next prime is 4085505287. The reversal of 4085505257 is 7525055804.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4085505257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4085505227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6820244 + ... + 6820842.

It is an arithmetic number, because the mean of its divisors is an integer number (263944200).

Almost surely, 2^4085505257 is an apocalyptic number.

It is an amenable number.

4085505257 is a deficient number, since it is larger than the sum of its proper divisors (137601943).

4085505257 is a wasteful number, since it uses less digits than its factorization.

4085505257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its (nonzero) digits is 280000, while the sum is 41.

The square root of 4085505257 is about 63917.9572342546. The cubic root of 4085505257 is about 1598.6323282596.

The spelling of 4085505257 in words is "four billion, eighty-five million, five hundred five thousand, two hundred fifty-seven".