13256949651216 has 80 divisors (see below), whose sum is σ = 35440026597888. Its totient is φ = 4265770752000.

The previous prime is 13256949651163. The next prime is 13256949651217. The reversal of 13256949651216 is 61215694965231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13256949651216.

It is not an unprimeable number, because it can be changed into a prime (13256949651217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10512091 + ... + 11705466.

Almost surely, 2^{13256949651216} is an apocalyptic number.

13256949651216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13256949651216 is an abundant number, since it is smaller than the sum of its proper divisors (22183076946672).

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

13256949651216 is a wasteful number, since it uses less digits than its factorization.

13256949651216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22218000 (or 22217994 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 60.

The spelling of 13256949651216 in words is "thirteen trillion, two hundred fifty-six billion, nine hundred forty-nine million, six hundred fifty-one thousand, two hundred sixteen".