1685585745 has 24 divisors (see below), whose sum is σ = 2922656256. Its totient is φ = 898679328.

The previous prime is 1685585687. The next prime is 1685585753. The reversal of 1685585745 is 5475855861.

1685585745 is a `hidden beast` number, since 1 + 68 + 5 + 5 + 8 + 574 + 5 = 666.

It is not a de Polignac number, because 1685585745 - 2⁹ = 1685585233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1685585691 and 1685585700.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221392 + ... + 228878.

It is an arithmetic number, because the mean of its divisors is an integer number (121777344).

Almost surely, 2^1685585745 is an apocalyptic number.

1685585745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1685585745 is a deficient number, since it is larger than the sum of its proper divisors (1237070511).

1685585745 is a wasteful number, since it uses less digits than its factorization.

1685585745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12501 (or 12498 counting only the distinct ones).

The product of its digits is 6720000, while the sum is 54.

The square root of 1685585745 is about 41055.8856316607. The cubic root of 1685585745 is about 1190.1004422904.

The spelling of 1685585745 in words is "one billion, six hundred eighty-five million, five hundred eighty-five thousand, seven hundred forty-five".