1685716479 has 12 divisors (see below), whose sum is σ = 2435725656. Its totient is φ = 1123440912.

The previous prime is 1685716477. The next prime is 1685716493. The reversal of 1685716479 is 9746175861.

1685716479 is a `hidden beast` number, since 1 + 6 + 8 + 571 + 64 + 7 + 9 = 666.

It is not a de Polignac number, because 1685716479 - 2¹ = 1685716477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685716477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412 + ... + 58065.

It is an arithmetic number, because the mean of its divisors is an integer number (202977138).

Almost surely, 2^1685716479 is an apocalyptic number.

1685716479 is a deficient number, since it is larger than the sum of its proper divisors (750009177).

1685716479 is a wasteful number, since it uses less digits than its factorization.

1685716479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61686 (or 61683 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 1685716479 is about 41057.4777476649. The cubic root of 1685716479 is about 1190.1312095513.

The spelling of 1685716479 in words is "one billion, six hundred eighty-five million, seven hundred sixteen thousand, four hundred seventy-nine".