16408841409 has 45 divisors (see below), whose sum is σ = 25171321329. Its totient is φ = 10652546520.

The previous prime is 16408841381. The next prime is 16408841419. The reversal of 16408841409 is 90414880461.

The square root of 16408841409 is 128097.

It is a perfect power (a square), and thus also a powerful number.

16408841409 is a `hidden beast` number, since 164 + 0 + 8 + 84 + 1 + 409 = 666.

It is not a de Polignac number, because 16408841409 - 2⁹ = 16408840897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16408841419) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 49573374 + ... + 49573704.

Almost surely, 2^16408841409 is an apocalyptic number.

16408841409 is the 128097-th square number.

16408841409 is the 64049-th centered octagonal number.

It is an amenable number.

16408841409 is a deficient number, since it is larger than the sum of its proper divisors (8762479920).

16408841409 is an frugal number, since it uses more digits than its factorization.

16408841409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 16408841409 in words is "sixteen billion, four hundred eight million, eight hundred forty-one thousand, four hundred nine".