1340443475561 has 4 divisors (see below), whose sum is σ = 1341539505792. Its totient is φ = 1339347445332.

The previous prime is 1340443475557. The next prime is 1340443475563. The reversal of 1340443475561 is 1655743440431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1340443475561 - 2² = 1340443475557 is a prime.

It is a super-2 number, since 2×1340443475561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340443475563) 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, 548013281 + ... + 548015726.

It is an arithmetic number, because the mean of its divisors is an integer number (335384876448).

Almost surely, 2^{1340443475561} is an apocalyptic number.

It is an amenable number.

1340443475561 is a deficient number, since it is larger than the sum of its proper divisors (1096030231).

1340443475561 is a wasteful number, since it uses less digits than its factorization.

1340443475561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096030230.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 1340443475561 in words is "one trillion, three hundred forty billion, four hundred forty-three million, four hundred seventy-five thousand, five hundred sixty-one".