1685420516 has 24 divisors (see below), whose sum is σ = 3179461824. Its totient is φ = 777129120.

The previous prime is 1685420447. The next prime is 1685420531. The reversal of 1685420516 is 6150245861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1685420516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40031 + ... + 70521.

It is an arithmetic number, because the mean of its divisors is an integer number (132477576).

Almost surely, 2^1685420516 is an apocalyptic number.

It is an amenable number.

1685420516 is a deficient number, since it is larger than the sum of its proper divisors (1494041308).

1685420516 is a wasteful number, since it uses less digits than its factorization.

1685420516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31571 (or 31569 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1685420516 is about 41053.8733373600. The cubic root of 1685420516 is about 1190.0615546155.

The spelling of 1685420516 in words is "one billion, six hundred eighty-five million, four hundred twenty thousand, five hundred sixteen".