123344511503 has 2 divisors, whose sum is σ = 123344511504. Its totient is φ = 123344511502.

The previous prime is 123344511491. The next prime is 123344511533. The reversal of 123344511503 is 305115443321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123344511503 - 2⁶ = 123344511439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123344511503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123344511533) 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, 61672255751 + 61672255752.

It is an arithmetic number, because the mean of its divisors is an integer number (61672255752).

Almost surely, 2^123344511503 is an apocalyptic number.

123344511503 is a deficient number, since it is larger than the sum of its proper divisors (1).

123344511503 is an equidigital number, since it uses as much as digits as its factorization.

123344511503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 123344511503 its reverse (305115443321), we get a palindrome (428459954824).

The spelling of 123344511503 in words is "one hundred twenty-three billion, three hundred forty-four million, five hundred eleven thousand, five hundred three".