1685120663 has 8 divisors (see below), whose sum is σ = 1703481600. Its totient is φ = 1666792800.

The previous prime is 1685120629. The next prime is 1685120683. The reversal of 1685120663 is 3660215861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1685120663 - 2¹⁸ = 1684858519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685120683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102113 + ... + 117461.

It is an arithmetic number, because the mean of its divisors is an integer number (212935200).

Almost surely, 2^1685120663 is an apocalyptic number.

1685120663 is a deficient number, since it is larger than the sum of its proper divisors (18360937).

1685120663 is a wasteful number, since it uses less digits than its factorization.

1685120663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16537.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1685120663 is about 41050.2212296109. The cubic root of 1685120663 is about 1189.9909758513.

The spelling of 1685120663 in words is "one billion, six hundred eighty-five million, one hundred twenty thousand, six hundred sixty-three".