16445555 has 16 divisors (see below), whose sum is σ = 22621440. Its totient is φ = 11243232.

The previous prime is 16445549. The next prime is 16445557. The reversal of 16445555 is 55554461.

It is not a de Polignac number, because 16445555 - 2⁶ = 16445491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (16445557) 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, 18716 + ... + 19574.

It is an arithmetic number, because the mean of its divisors is an integer number (1413840).

Almost surely, 2^16445555 is an apocalyptic number.

16445555 is a deficient number, since it is larger than the sum of its proper divisors (6175885).

16445555 is an equidigital number, since it uses as much as digits as its factorization.

16445555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its digits is 60000, while the sum is 35.

The square root of 16445555 is about 4055.3119485435. The cubic root of 16445555 is about 254.3018452593.

The spelling of 16445555 in words is "sixteen million, four hundred forty-five thousand, five hundred fifty-five".