16685007890 has 16 divisors (see below), whose sum is σ = 31613699520. Its totient is φ = 6322739760.

The previous prime is 16685007869. The next prime is 16685007893. The reversal of 16685007890 is 9870058661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16685007893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43907726 + ... + 43908105.

It is an arithmetic number, because the mean of its divisors is an integer number (1975856220).

Almost surely, 2^16685007890 is an apocalyptic number.

16685007890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16685007890 is a deficient number, since it is larger than the sum of its proper divisors (14928691630).

16685007890 is a wasteful number, since it uses less digits than its factorization.

16685007890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87815857.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 16685007890 in words is "sixteen billion, six hundred eighty-five million, seven thousand, eight hundred ninety".