1827525985 has 4 divisors (see below), whose sum is σ = 2193031188. Its totient is φ = 1462020784.

The previous prime is 1827525977. The next prime is 1827525989. The reversal of 1827525985 is 5895257281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5895257281 = 19 ⋅310276699.

It can be written as a sum of positive squares in 2 ways, for example, as 187032976 + 1640493009 = 13676^2 + 40503^2 .

It is a cyclic number.

It is not a de Polignac number, because 1827525985 - 2³ = 1827525977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1827525989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182752594 + ... + 182752603.

It is an arithmetic number, because the mean of its divisors is an integer number (548257797).

Almost surely, 2^1827525985 is an apocalyptic number.

It is an amenable number.

1827525985 is a deficient number, since it is larger than the sum of its proper divisors (365505203).

1827525985 is an equidigital number, since it uses as much as digits as its factorization.

1827525985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365505202.

The product of its digits is 2016000, while the sum is 52.

The square root of 1827525985 is about 42749.5729218433. The cubic root of 1827525985 is about 1222.6097464355.

The spelling of 1827525985 in words is "one billion, eight hundred twenty-seven million, five hundred twenty-five thousand, nine hundred eighty-five".