123644231544253 has 4 divisors (see below), whose sum is σ = 141307693193440. Its totient is φ = 105980769895068.

The previous prime is 123644231544227. The next prime is 123644231544299. The reversal of 123644231544253 is 352445132446321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123644231544253 - 2⁵ = 123644231544221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123644231544197 and 123644231544206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123644231544203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8831730824583 + ... + 8831730824596.

It is an arithmetic number, because the mean of its divisors is an integer number (35326923298360).

Almost surely, 2^{123644231544253} is an apocalyptic number.

It is an amenable number.

123644231544253 is a deficient number, since it is larger than the sum of its proper divisors (17663461649187).

123644231544253 is an equidigital number, since it uses as much as digits as its factorization.

123644231544253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17663461649186.

The product of its digits is 8294400, while the sum is 49.

The spelling of 123644231544253 in words is "one hundred twenty-three trillion, six hundred forty-four billion, two hundred thirty-one million, five hundred forty-four thousand, two hundred fifty-three".