1145441240665 has 4 divisors (see below), whose sum is σ = 1374529488804. Its totient is φ = 916352992528.

The previous prime is 1145441240663. The next prime is 1145441240681. The reversal of 1145441240665 is 5660421445411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 295106438169 + 850334802496 = 543237^2 + 922136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145441240665 - 2¹ = 1145441240663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145441240663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114544124062 + ... + 114544124071.

It is an arithmetic number, because the mean of its divisors is an integer number (343632372201).

Almost surely, 2^{1145441240665} is an apocalyptic number.

It is an amenable number.

1145441240665 is a deficient number, since it is larger than the sum of its proper divisors (229088248139).

1145441240665 is an equidigital number, since it uses as much as digits as its factorization.

1145441240665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229088248138.

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 1145441240665 in words is "one trillion, one hundred forty-five billion, four hundred forty-one million, two hundred forty thousand, six hundred sixty-five".