16405706408 has 128 divisors (see below), whose sum is σ = 40780185600. Its totient is φ = 6005373696.

The previous prime is 16405706407. The next prime is 16405706419. The reversal of 16405706408 is 80460750461.

It is not an unprimeable number, because it can be changed into a prime (16405706407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580985 + ... + 608567.

It is an arithmetic number, because the mean of its divisors is an integer number (318595200).

Almost surely, 2^16405706408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16405706408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20390092800).

16405706408 is an abundant number, since it is smaller than the sum of its proper divisors (24374479192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16405706408 is a wasteful number, since it uses less digits than its factorization.

16405706408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27671 (or 27667 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 16405706408 in words is "sixteen billion, four hundred five million, seven hundred six thousand, four hundred eight".