13140420350440 has 32 divisors (see below), whose sum is σ = 29574670185000. Its totient is φ = 5254617136384.

The previous prime is 13140420350389. The next prime is 13140420350513. The reversal of 13140420350440 is 4405302404131.

It can be written as a sum of positive squares in 4 ways, for example, as 9669226573444 + 3471193776996 = 3109538^2 + 1863114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48331615 + ... + 48602734.

Almost surely, 2^{13140420350440} is an apocalyptic number.

13140420350440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140420350440 is an abundant number, since it is smaller than the sum of its proper divisors (16434249834560).

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

13140420350440 is a wasteful number, since it uses less digits than its factorization.

13140420350440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96937749 (or 96937745 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 13140420350440 its reverse (4405302404131), we get a palindrome (17545722754571).

The spelling of 13140420350440 in words is "thirteen trillion, one hundred forty billion, four hundred twenty million, three hundred fifty thousand, four hundred forty".