123404251321503 has 12 divisors (see below), whose sum is σ = 178262921964400. Its totient is φ = 82263807009216.

The previous prime is 123404251321501. The next prime is 123404251321517. The reversal of 123404251321503 is 305123152404321.

123404251321503 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 0 + 425 + 13 + 215 + 0 + 3 = 666.

It is not a de Polignac number, because 123404251321503 - 2¹ = 123404251321501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123404251321501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 474352051 + ... + 474612132.

Almost surely, 2^{123404251321503} is an apocalyptic number.

123404251321503 is a deficient number, since it is larger than the sum of its proper divisors (54858670642897).

123404251321503 is a wasteful number, since it uses less digits than its factorization.

123404251321503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948978638 (or 948978635 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 123404251321503 in words is "one hundred twenty-three trillion, four hundred four billion, two hundred fifty-one million, three hundred twenty-one thousand, five hundred three".