1611355225523 has 2 divisors, whose sum is σ = 1611355225524. Its totient is φ = 1611355225522.

The previous prime is 1611355225511. The next prime is 1611355225537. The reversal of 1611355225523 is 3255225531161.

It is a weak prime.

It is an emirp because it is prime and its reverse (3255225531161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1611355225523 - 2⁴ = 1611355225507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1611355225553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805677612761 + 805677612762.

It is an arithmetic number, because the mean of its divisors is an integer number (805677612762).

Almost surely, 2^{1611355225523} is an apocalyptic number.

1611355225523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611355225523 is an equidigital number, since it uses as much as digits as its factorization.

1611355225523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270000, while the sum is 41.

The spelling of 1611355225523 in words is "one trillion, six hundred eleven billion, three hundred fifty-five million, two hundred twenty-five thousand, five hundred twenty-three".