123405550126 has 16 divisors (see below), whose sum is σ = 194886812160. Its totient is φ = 58444477560.

The previous prime is 123405550117. The next prime is 123405550127. The reversal of 123405550126 is 621055504321.

It is a junction number, because it is equal to n+sod(n) for n = 123405550091 and 123405550100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123405550127) 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 7 ways as a sum of consecutive naturals, for example, 88896 + ... + 504691.

It is an arithmetic number, because the mean of its divisors is an integer number (12180425760).

Almost surely, 2^123405550126 is an apocalyptic number.

123405550126 is a deficient number, since it is larger than the sum of its proper divisors (71481262034).

123405550126 is a wasteful number, since it uses less digits than its factorization.

123405550126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599079.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 123405550126 in words is "one hundred twenty-three billion, four hundred five million, five hundred fifty thousand, one hundred twenty-six".