1816485625 has 20 divisors (see below), whose sum is σ = 2275287300. Its totient is φ = 1449728000.

The previous prime is 1816485623. The next prime is 1816485653. The reversal of 1816485625 is 5265846181.

It can be written as a sum of positive squares in 10 ways, for example, as 1558433529 + 258052096 = 39477^2 + 16064^2 .

It is not a de Polignac number, because 1816485625 - 2¹ = 1816485623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1816485623) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 277389 + ... + 283861.

It is an arithmetic number, because the mean of its divisors is an integer number (113764365).

Almost surely, 2^1816485625 is an apocalyptic number.

It is an amenable number.

1816485625 is a deficient number, since it is larger than the sum of its proper divisors (458801675).

1816485625 is an frugal number, since it uses more digits than its factorization.

1816485625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942 (or 6927 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The square root of 1816485625 is about 42620.2490020882. The cubic root of 1816485625 is about 1220.1427820437.

The spelling of 1816485625 in words is "one billion, eight hundred sixteen million, four hundred eighty-five thousand, six hundred twenty-five".