123355306445 has 16 divisors (see below), whose sum is σ = 169675004928. Its totient is φ = 84335489280.

The previous prime is 123355306441. The next prime is 123355306463. The reversal of 123355306445 is 544603553321.

It is not a de Polignac number, because 123355306445 - 2² = 123355306441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123355306441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5217341 + ... + 5240930.

It is an arithmetic number, because the mean of its divisors is an integer number (10604687808).

Almost surely, 2^123355306445 is an apocalyptic number.

It is an amenable number.

123355306445 is a deficient number, since it is larger than the sum of its proper divisors (46319698483).

123355306445 is a wasteful number, since it uses less digits than its factorization.

123355306445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458620.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 123355306445 its reverse (544603553321), we get a palindrome (667958859766).

The spelling of 123355306445 in words is "one hundred twenty-three billion, three hundred fifty-five million, three hundred six thousand, four hundred forty-five".