13220435040440 has 64 divisors (see below), whose sum is σ = 31076372844000. Its totient is φ = 5055270438400.

The previous prime is 13220435040433. The next prime is 13220435040457. The reversal of 13220435040440 is 4404053402231.

It is a junction number, because it is equal to n+sod(n) for n = 13220435040397 and 13220435040406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56303270 + ... + 56537589.

Almost surely, 2^{13220435040440} is an apocalyptic number.

13220435040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220435040440 is an abundant number, since it is smaller than the sum of its proper divisors (17855937803560).

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

13220435040440 is a wasteful number, since it uses less digits than its factorization.

13220435040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112841000 (or 112840996 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 13220435040440 its reverse (4404053402231), we get a palindrome (17624488442671).

The spelling of 13220435040440 in words is "thirteen trillion, two hundred twenty billion, four hundred thirty-five million, forty thousand, four hundred forty".