123545551343441 has 2 divisors, whose sum is σ = 123545551343442. Its totient is φ = 123545551343440.

The previous prime is 123545551343281. The next prime is 123545551343453. The reversal of 123545551343441 is 144343155545321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112494554259025 + 11050997084416 = 10606345^2 + 3324304^2 .

It is an emirp because it is prime and its reverse (144343155545321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123545551343441 - 2¹⁰ = 123545551342417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123545551343441.

It is not a weakly prime, because it can be changed into another prime (123545551343741) 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, 61772775671720 + 61772775671721.

It is an arithmetic number, because the mean of its divisors is an integer number (61772775671721).

Almost surely, 2^{123545551343441} is an apocalyptic number.

It is an amenable number.

123545551343441 is a deficient number, since it is larger than the sum of its proper divisors (1).

123545551343441 is an equidigital number, since it uses as much as digits as its factorization.

123545551343441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640000, while the sum is 50.

The spelling of 123545551343441 in words is "one hundred twenty-three trillion, five hundred forty-five billion, five hundred fifty-one million, three hundred forty-three thousand, four hundred forty-one".