13320261256 has 16 divisors (see below), whose sum is σ = 24992724240. Its totient is φ = 6655534800.

The previous prime is 13320261221. The next prime is 13320261259. The reversal of 13320261256 is 65216202331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13320261259) 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, 562146 + ... + 585361.

It is an arithmetic number, because the mean of its divisors is an integer number (1562045265).

Almost surely, 2^13320261256 is an apocalyptic number.

It is an amenable number.

13320261256 is a deficient number, since it is larger than the sum of its proper divisors (11672462984).

13320261256 is a wasteful number, since it uses less digits than its factorization.

13320261256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148964 (or 1148960 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 13320261256 its reverse (65216202331), we get a palindrome (78536463587).

It can be divided in two parts, 13320 and 261256, that added together give a square (274576 = 524²).

The spelling of 13320261256 in words is "thirteen billion, three hundred twenty million, two hundred sixty-one thousand, two hundred fifty-six".