123255313621265 has 16 divisors (see below), whose sum is σ = 172966925163648. Its totient is φ = 82552396098816.

The previous prime is 123255313621199. The next prime is 123255313621267. The reversal of 123255313621265 is 562126313552321.

It is a happy number.

It is not a de Polignac number, because 123255313621265 - 2¹⁸ = 123255313359121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123255313621267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40948607672 + ... + 40948610681.

It is an arithmetic number, because the mean of its divisors is an integer number (10810432822728).

Almost surely, 2^{123255313621265} is an apocalyptic number.

It is an amenable number.

123255313621265 is a deficient number, since it is larger than the sum of its proper divisors (49711611542383).

123255313621265 is an equidigital number, since it uses as much as digits as its factorization.

123255313621265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81897218408.

The product of its digits is 1944000, while the sum is 47.

The spelling of 123255313621265 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, three hundred thirteen million, six hundred twenty-one thousand, two hundred sixty-five".