16109645 has 16 divisors (see below), whose sum is σ = 20124720. Its totient is φ = 12364800.

The previous prime is 16109641. The next prime is 16109651. The reversal of 16109645 is 54690161.

It can be written as a sum of positive squares in 8 ways, for example, as 5476 + 16104169 = 74^2 + 4013^2 .

It is not a de Polignac number, because 16109645 - 2² = 16109641 is a prime.

It is a super-3 number, since 3×16109645³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16109641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34715 + ... + 35175.

It is an arithmetic number, because the mean of its divisors is an integer number (1257795).

Almost surely, 2^16109645 is an apocalyptic number.

It is an amenable number.

16109645 is a deficient number, since it is larger than the sum of its proper divisors (4015075).

16109645 is a wasteful number, since it uses less digits than its factorization.

16109645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736.

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

The square root of 16109645 is about 4013.6822245913. The cubic root of 16109645 is about 252.5585003165.

The spelling of 16109645 in words is "sixteen million, one hundred nine thousand, six hundred forty-five".