1585855438207 has 16 divisors (see below), whose sum is σ = 1643177914560. Its totient is φ = 1528709833728.

The previous prime is 1585855438169. The next prime is 1585855438231. The reversal of 1585855438207 is 7028345585851.

It is a cyclic number.

It is not a de Polignac number, because 1585855438207 - 2¹⁵ = 1585855405439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1585855432207) 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, 163535983 + ... + 163545679.

It is an arithmetic number, because the mean of its divisors is an integer number (102698619660).

Almost surely, 2^{1585855438207} is an apocalyptic number.

1585855438207 is a deficient number, since it is larger than the sum of its proper divisors (57322476353).

1585855438207 is an equidigital number, since it uses as much as digits as its factorization.

1585855438207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18210.

The product of its (nonzero) digits is 53760000, while the sum is 61.

The spelling of 1585855438207 in words is "one trillion, five hundred eighty-five billion, eight hundred fifty-five million, four hundred thirty-eight thousand, two hundred seven".