1355365205543 has 4 divisors (see below), whose sum is σ = 1356512848728. Its totient is φ = 1354217562360.

The previous prime is 1355365205489. The next prime is 1355365205611. The reversal of 1355365205543 is 3455025635531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1355365205543 - 2⁶ = 1355365205479 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 (1355365265543) 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, 573819821 + ... + 573822182.

It is an arithmetic number, because the mean of its divisors is an integer number (339128212182).

Almost surely, 2^{1355365205543} is an apocalyptic number.

1355365205543 is a deficient number, since it is larger than the sum of its proper divisors (1147643185).

1355365205543 is a wasteful number, since it uses less digits than its factorization.

1355365205543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147643184.

The product of its (nonzero) digits is 4050000, while the sum is 47.

The spelling of 1355365205543 in words is "one trillion, three hundred fifty-five billion, three hundred sixty-five million, two hundred five thousand, five hundred forty-three".