123544520154040 has 16 divisors (see below), whose sum is σ = 277975170346680. Its totient is φ = 49417808061600.

The previous prime is 123544520154007. The next prime is 123544520154059. The reversal of 123544520154040 is 40451025445321.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3088613003851 = 123544520154040 / (1 + 2 + 3 + 5 + 4 + 4 + 5 + 2 + 0 + 1 + 5 + 4 + 0 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 123544520153984 and 123544520154002.

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, 1544306501886 + ... + 1544306501965.

Almost surely, 2^{123544520154040} is an apocalyptic number.

123544520154040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123544520154040 is an abundant number, since it is smaller than the sum of its proper divisors (154430650192640).

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

123544520154040 is a wasteful number, since it uses less digits than its factorization.

123544520154040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088613003862 (or 3088613003858 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 123544520154040 its reverse (40451025445321), we get a palindrome (163995545599361).

The spelling of 123544520154040 in words is "one hundred twenty-three trillion, five hundred forty-four billion, five hundred twenty million, one hundred fifty-four thousand, forty".