1205551642343 has 2 divisors, whose sum is σ = 1205551642344. Its totient is φ = 1205551642342.

The previous prime is 1205551642327. The next prime is 1205551642363. The reversal of 1205551642343 is 3432461555021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205551642343 - 2⁴ = 1205551642327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205551642343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205551642363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602775821171 + 602775821172.

It is an arithmetic number, because the mean of its divisors is an integer number (602775821172).

Almost surely, 2^{1205551642343} is an apocalyptic number.

1205551642343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205551642343 is an equidigital number, since it uses as much as digits as its factorization.

1205551642343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 1205551642343 in words is "one trillion, two hundred five billion, five hundred fifty-one million, six hundred forty-two thousand, three hundred forty-three".