123354310655 has 4 divisors (see below), whose sum is σ = 148025172792. Its totient is φ = 98683448520.

The previous prime is 123354310549. The next prime is 123354310747. The reversal of 123354310655 is 556013453321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556013453321 = 44741 ⋅12427381.

It is not a de Polignac number, because 123354310655 - 2²⁰ = 123353262079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12335431061 + ... + 12335431070.

It is an arithmetic number, because the mean of its divisors is an integer number (37006293198).

Almost surely, 2^123354310655 is an apocalyptic number.

123354310655 is a deficient number, since it is larger than the sum of its proper divisors (24670862137).

123354310655 is an equidigital number, since it uses as much as digits as its factorization.

123354310655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24670862136.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 123354310655 its reverse (556013453321), we get a palindrome (679367763976).

The spelling of 123354310655 in words is "one hundred twenty-three billion, three hundred fifty-four million, three hundred ten thousand, six hundred fifty-five".