13155210432440 has 16 divisors (see below), whose sum is σ = 29599223473080. Its totient is φ = 5262084172960.

The previous prime is 13155210432439. The next prime is 13155210432449. The reversal of 13155210432440 is 4423401255131.

It is a self number, because there is not a number n which added to its sum of digits gives 13155210432440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13155210432449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164440130366 + ... + 164440130445.

Almost surely, 2^{13155210432440} is an apocalyptic number.

13155210432440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13155210432440 is an abundant number, since it is smaller than the sum of its proper divisors (16444013040640).

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

13155210432440 is a wasteful number, since it uses less digits than its factorization.

13155210432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328880260822 (or 328880260818 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 13155210432440 its reverse (4423401255131), we get a palindrome (17578611687571).

The spelling of 13155210432440 in words is "thirteen trillion, one hundred fifty-five billion, two hundred ten million, four hundred thirty-two thousand, four hundred forty".