16622509 has 8 divisors (see below), whose sum is σ = 17124320. Its totient is φ = 16123536.

The previous prime is 16622407. The next prime is 16622513. The reversal of 16622509 is 90522661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16622509 - 2¹³ = 16614317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18922 + ... + 19780.

It is an arithmetic number, because the mean of its divisors is an integer number (2140540).

Almost surely, 2^16622509 is an apocalyptic number.

It is an amenable number.

16622509 is a deficient number, since it is larger than the sum of its proper divisors (501811).

16622509 is an equidigital number, since it uses as much as digits as its factorization.

16622509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 16622509 is about 4077.0711301129. The cubic root of 16622509 is about 255.2106883640.

The spelling of 16622509 in words is "sixteen million, six hundred twenty-two thousand, five hundred nine".