13235115434440 has 16 divisors (see below), whose sum is σ = 29779009727580. Its totient is φ = 5294046173760.

The previous prime is 13235115434413. The next prime is 13235115434449. The reversal of 13235115434440 is 4443451153231.

It can be written as a sum of positive squares in 2 ways, for example, as 13122201961764 + 112913472676 = 3622458^2 + 336026^2 .

It is a super-2 number, since 2×13235115434440² (a number of 27 digits) contains 22 as substring.

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: 330877885861 = 13235115434440 / (1 + 3 + 2 + 3 + 5 + 1 + 1 + 5 + 4 + 3 + 4 + 4 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 13235115434393 and 13235115434402.

It is not an unprimeable number, because it can be changed into a prime (13235115434449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165438942891 + ... + 165438942970.

Almost surely, 2^{13235115434440} is an apocalyptic number.

13235115434440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13235115434440 is an abundant number, since it is smaller than the sum of its proper divisors (16543894293140).

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

13235115434440 is a wasteful number, since it uses less digits than its factorization.

13235115434440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330877885872 (or 330877885868 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 13235115434440 its reverse (4443451153231), we get a palindrome (17678566587671).

The spelling of 13235115434440 in words is "thirteen trillion, two hundred thirty-five billion, one hundred fifteen million, four hundred thirty-four thousand, four hundred forty".