13263452440 has 128 divisors (see below), whose sum is σ = 35084689920. Its totient is φ = 4417920000.

The previous prime is 13263452429. The next prime is 13263452533. The reversal of 13263452440 is 4425436231.

It is a junction number, because it is equal to n+sod(n) for n = 13263452396 and 13263452405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2879179 + ... + 2883781.

It is an arithmetic number, because the mean of its divisors is an integer number (274099140).

Almost surely, 2^13263452440 is an apocalyptic number.

13263452440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13263452440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17542344960).

13263452440 is an abundant number, since it is smaller than the sum of its proper divisors (21821237480).

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

13263452440 is a wasteful number, since it uses less digits than its factorization.

13263452440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4913 (or 4909 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 13263452440 its reverse (4425436231), we get a palindrome (17688888671).

The spelling of 13263452440 in words is "thirteen billion, two hundred sixty-three million, four hundred fifty-two thousand, four hundred forty".