13506220256 has 48 divisors (see below), whose sum is σ = 26875596384. Its totient is φ = 6680807424.

The previous prime is 13506220219. The next prime is 13506220291. The reversal of 13506220256 is 65202260531.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5460236 + ... + 5462708.

It is an arithmetic number, because the mean of its divisors is an integer number (559908258).

Almost surely, 2^13506220256 is an apocalyptic number.

13506220256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13506220256 is a deficient number, since it is larger than the sum of its proper divisors (13369376128).

13506220256 is a wasteful number, since it uses less digits than its factorization.

13506220256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243 (or 4235 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 13506220256 its reverse (65202260531), we get a palindrome (78708480787).

The spelling of 13506220256 in words is "thirteen billion, five hundred six million, two hundred twenty thousand, two hundred fifty-six".