16144765 has 48 divisors (see below), whose sum is σ = 25108272. Its totient is φ = 9870336.

The previous prime is 16144763. The next prime is 16144771. The reversal of 16144765 is 56744161.

16144765 = 273² + 274² + ... + 409².

It can be written as a sum of positive squares in 8 ways, for example, as 441 + 16144324 = 21^2 + 4018^2 .

It is not a de Polignac number, because 16144765 - 2¹ = 16144763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16144765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16144763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117777 + ... + 117913.

It is an arithmetic number, because the mean of its divisors is an integer number (523089).

Almost surely, 2^16144765 is an apocalyptic number.

It is an amenable number.

16144765 is a deficient number, since it is larger than the sum of its proper divisors (8963507).

16144765 is a wasteful number, since it uses less digits than its factorization.

16144765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 199 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 16144765 is about 4018.0548776740. The cubic root of 16144765 is about 252.7418980413.

The spelling of 16144765 in words is "sixteen million, one hundred forty-four thousand, seven hundred sixty-five".