16481409 has 16 divisors (see below), whose sum is σ = 26207232. Its totient is φ = 9008208.

The previous prime is 16481401. The next prime is 16481441. The reversal of 16481409 is 90418461.

It is not a de Polignac number, because 16481409 - 2³ = 16481401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16481409.

It is not an unprimeable number, because it can be changed into a prime (16481401) 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, 16579 + ... + 17544.

It is an arithmetic number, because the mean of its divisors is an integer number (1637952).

Almost surely, 2^16481409 is an apocalyptic number.

It is an amenable number.

16481409 is a deficient number, since it is larger than the sum of its proper divisors (9725823).

16481409 is a wasteful number, since it uses less digits than its factorization.

16481409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34156.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 16481409 is about 4059.7301634468. The cubic root of 16481409 is about 254.4865176591.

The spelling of 16481409 in words is "sixteen million, four hundred eighty-one thousand, four hundred nine".