16655545 has 4 divisors (see below), whose sum is σ = 19986660. Its totient is φ = 13324432.

The previous prime is 16655543. The next prime is 16655567. The reversal of 16655545 is 54555661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54555661 = 829 ⋅65809.

It can be written as a sum of positive squares in 2 ways, for example, as 13162384 + 3493161 = 3628^2 + 1869^2 .

It is a cyclic number.

It is not a de Polignac number, because 16655545 - 2¹ = 16655543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16655543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665550 + ... + 1665559.

It is an arithmetic number, because the mean of its divisors is an integer number (4996665).

Almost surely, 2^16655545 is an apocalyptic number.

It is an amenable number.

16655545 is a deficient number, since it is larger than the sum of its proper divisors (3331115).

16655545 is an equidigital number, since it uses as much as digits as its factorization.

16655545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331114.

The product of its digits is 90000, while the sum is 37.

The square root of 16655545 is about 4081.1205569059. The cubic root of 16655545 is about 255.3796472346.

The spelling of 16655545 in words is "sixteen million, six hundred fifty-five thousand, five hundred forty-five".