123344040555 has 12 divisors (see below), whose sum is σ = 213796337040. Its totient is φ = 65783488272.

The previous prime is 123344040541. The next prime is 123344040563. The reversal of 123344040555 is 555040443321.

123344040555 is a `hidden beast` number, since 1 + 23 + 3 + 4 + 40 + 40 + 555 = 666.

It is not a de Polignac number, because 123344040555 - 2⁴ = 123344040539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370489295 + ... + 1370489384.

It is an arithmetic number, because the mean of its divisors is an integer number (17816361420).

Almost surely, 2^123344040555 is an apocalyptic number.

123344040555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123344040555 is a deficient number, since it is larger than the sum of its proper divisors (90452296485).

123344040555 is a wasteful number, since it uses less digits than its factorization.

123344040555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740978690 (or 2740978687 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 123344040555 its reverse (555040443321), we get a palindrome (678384483876).

The spelling of 123344040555 in words is "one hundred twenty-three billion, three hundred forty-four million, forty thousand, five hundred fifty-five".