123543011255544 has 48 divisors (see below), whose sum is σ = 334598655573000. Its totient is φ = 41180634510144.

The previous prime is 123543011255537. The next prime is 123543011255549. The reversal of 123543011255544 is 445552110345321.

123543011255544 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 43 + 0 + 1 + 12 + 55 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 123543011255544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123543011255549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452767 + ... + 15725489.

Almost surely, 2^{123543011255544} is an apocalyptic number.

It is an amenable number.

123543011255544 is an abundant number, since it is smaller than the sum of its proper divisors (211055644317456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123543011255544 is a wasteful number, since it uses less digits than its factorization.

123543011255544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15385084 (or 15385077 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

The spelling of 123543011255544 in words is "one hundred twenty-three trillion, five hundred forty-three billion, eleven million, two hundred fifty-five thousand, five hundred forty-four".