1440257144465 has 8 divisors (see below), whose sum is σ = 1734459139368. Its totient is φ = 1148105338240.

The previous prime is 1440257144437. The next prime is 1440257144467. The reversal of 1440257144465 is 5644417520441.

It can be written as a sum of positive squares in 4 ways, for example, as 33974231041 + 1406282913424 = 184321^2 + 1185868^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1440257144465 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440257144467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512545622 + ... + 512548431.

It is an arithmetic number, because the mean of its divisors is an integer number (216807392421).

Almost surely, 2^{1440257144465} is an apocalyptic number.

It is an amenable number.

1440257144465 is a deficient number, since it is larger than the sum of its proper divisors (294201994903).

1440257144465 is a wasteful number, since it uses less digits than its factorization.

1440257144465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025094339.

The product of its (nonzero) digits is 2150400, while the sum is 47.

The spelling of 1440257144465 in words is "one trillion, four hundred forty billion, two hundred fifty-seven million, one hundred forty-four thousand, four hundred sixty-five".