1340638115441 has 4 divisors (see below), whose sum is σ = 1341743341812. Its totient is φ = 1339532889072.

The previous prime is 1340638115363. The next prime is 1340638115459. The reversal of 1340638115441 is 1445118360431.

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 652708873216 + 687929242225 = 807904^2 + 829415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340638115441 - 2³⁰ = 1339564373617 is a prime.

It is a super-3 number, since 3×1340638115441³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340688115441) 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, 552611366 + ... + 552613791.

It is an arithmetic number, because the mean of its divisors is an integer number (335435835453).

Almost surely, 2^{1340638115441} is an apocalyptic number.

It is an amenable number.

1340638115441 is a deficient number, since it is larger than the sum of its proper divisors (1105226371).

1340638115441 is a wasteful number, since it uses less digits than its factorization.

1340638115441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105226370.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 1340638115441 in words is "one trillion, three hundred forty billion, six hundred thirty-eight million, one hundred fifteen thousand, four hundred forty-one".