1440285540509 has 4 divisors (see below), whose sum is σ = 1463896778940. Its totient is φ = 1416674302080.

The previous prime is 1440285540457. The next prime is 1440285540517. The reversal of 1440285540509 is 9050455820441.

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 659907648409 + 780377892100 = 812347^2 + 883390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440285540509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440285540709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11805619124 + ... + 11805619245.

It is an arithmetic number, because the mean of its divisors is an integer number (365974194735).

Almost surely, 2^{1440285540509} is an apocalyptic number.

It is an amenable number.

1440285540509 is a deficient number, since it is larger than the sum of its proper divisors (23611238431).

1440285540509 is an equidigital number, since it uses as much as digits as its factorization.

1440285540509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23611238430.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 1440285540509 in words is "one trillion, four hundred forty billion, two hundred eighty-five million, five hundred forty thousand, five hundred nine".