16144145065 has 8 divisors (see below), whose sum is σ = 19896568200. Its totient is φ = 12566253312.

The previous prime is 16144145051. The next prime is 16144145071. The reversal of 16144145065 is 56054144161.

It can be written as a sum of positive squares in 4 ways, for example, as 8984954521 + 7159190544 = 94789^2 + 84612^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16144145065 - 2¹³ = 16144136873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43632640 + ... + 43633009.

It is an arithmetic number, because the mean of its divisors is an integer number (2487071025).

Almost surely, 2^16144145065 is an apocalyptic number.

It is an amenable number.

16144145065 is a deficient number, since it is larger than the sum of its proper divisors (3752423135).

16144145065 is an equidigital number, since it uses as much as digits as its factorization.

16144145065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87265691.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 16144145065 in words is "sixteen billion, one hundred forty-four million, one hundred forty-five thousand, sixty-five".