16145609 has 8 divisors (see below), whose sum is σ = 16892160. Its totient is φ = 15431988.

The previous prime is 16145599. The next prime is 16145617. The reversal of 16145609 is 90654161.

It is not a de Polignac number, because 16145609 - 2¹² = 16141513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16145659) 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, 11504 + ... + 12830.

It is an arithmetic number, because the mean of its divisors is an integer number (2111520).

Almost surely, 2^16145609 is an apocalyptic number.

It is an amenable number.

16145609 is a deficient number, since it is larger than the sum of its proper divisors (746551).

16145609 is an frugal number, since it uses more digits than its factorization.

16145609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 16145609 is about 4018.1599022438. The cubic root of 16145609 is about 252.7463021613.

The spelling of 16145609 in words is "sixteen million, one hundred forty-five thousand, six hundred nine".