1440355705213 has 4 divisors (see below), whose sum is σ = 1525082511420. Its totient is φ = 1355628899008.

The previous prime is 1440355705199. The next prime is 1440355705289. The reversal of 1440355705213 is 3125075530441.

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 452601981049 + 987753724164 = 672757^2 + 993858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440355705213 - 2³³ = 1431765770621 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 (1440355105213) 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, 42363403078 + ... + 42363403111.

It is an arithmetic number, because the mean of its divisors is an integer number (381270627855).

Almost surely, 2^{1440355705213} is an apocalyptic number.

It is an amenable number.

1440355705213 is a deficient number, since it is larger than the sum of its proper divisors (84726806207).

1440355705213 is an equidigital number, since it uses as much as digits as its factorization.

1440355705213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84726806206.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 1440355705213 in words is "one trillion, four hundred forty billion, three hundred fifty-five million, seven hundred five thousand, two hundred thirteen".