16640409085011 has 16 divisors (see below), whose sum is σ = 24689866819200. Its totient is φ = 11076772044744.

The previous prime is 16640409084941. The next prime is 16640409085021. The reversal of 16640409085011 is 11058090404661.

16640409085011 is a `hidden beast` number, since 1 + 66 + 40 + 40 + 9 + 0 + 8 + 501 + 1 = 666.

It is not a de Polignac number, because 16640409085011 - 2¹⁵ = 16640409052243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16640409085021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467593321 + ... + 467628906.

It is an arithmetic number, because the mean of its divisors is an integer number (1543116676200).

Almost surely, 2^{16640409085011} is an apocalyptic number.

16640409085011 is a deficient number, since it is larger than the sum of its proper divisors (8049457734189).

16640409085011 is an equidigital number, since it uses as much as digits as its factorization.

16640409085011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935222895 (or 935222889 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

Adding to 16640409085011 its reverse (11058090404661), we get a palindrome (27698499489672).

The spelling of 16640409085011 in words is "sixteen trillion, six hundred forty billion, four hundred nine million, eighty-five thousand, eleven".