1685280001 has 16 divisors (see below), whose sum is σ = 1773299200. Its totient is φ = 1599523200.

The previous prime is 1685279969. The next prime is 1685280043. The reversal of 1685280001 is 1000825861.

It is a cyclic number.

It is not a de Polignac number, because 1685280001 - 2⁵ = 1685279969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (1685280101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772330 + ... + 774508.

It is an arithmetic number, because the mean of its divisors is an integer number (110831200).

Almost surely, 2^1685280001 is an apocalyptic number.

It is an amenable number.

1685280001 is a deficient number, since it is larger than the sum of its proper divisors (88019199).

1685280001 is a wasteful number, since it uses less digits than its factorization.

1685280001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1685280001 is about 41052.1619528132. The cubic root of 1685280001 is about 1190.0284815347.

The spelling of 1685280001 in words is "one billion, six hundred eighty-five million, two hundred eighty thousand, one".