13123025505440 has 48 divisors (see below), whose sum is σ = 31465881330912. Its totient is φ = 5170863777024.

The previous prime is 13123025505439. The next prime is 13123025505449. The reversal of 13123025505440 is 4450552032131.

It is a self number, because there is not a number n which added to its sum of digits gives 13123025505440.

It is not an unprimeable number, because it can be changed into a prime (13123025505449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612070694 + ... + 612092133.

It is an arithmetic number, because the mean of its divisors is an integer number (655539194394).

Almost surely, 2^{13123025505440} is an apocalyptic number.

13123025505440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123025505440 is an abundant number, since it is smaller than the sum of its proper divisors (18342855825472).

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

13123025505440 is a wasteful number, since it uses less digits than its factorization.

13123025505440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224162909 (or 1224162901 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 13123025505440 its reverse (4450552032131), we get a palindrome (17573577537571).

The spelling of 13123025505440 in words is "thirteen trillion, one hundred twenty-three billion, twenty-five million, five hundred five thousand, four hundred forty".