13220364648865 has 32 divisors (see below), whose sum is σ = 17754065626752. Its totient is φ = 9366920640000.

The previous prime is 13220364648809. The next prime is 13220364648899. The reversal of 13220364648865 is 56884646302231.

It is a happy number.

It is not a de Polignac number, because 13220364648865 - 2¹¹ = 13220364646817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2600907 + ... + 5762416.

It is an arithmetic number, because the mean of its divisors is an integer number (554814550836).

Almost surely, 2^{13220364648865} is an apocalyptic number.

It is an amenable number.

13220364648865 is a deficient number, since it is larger than the sum of its proper divisors (4533700977887).

13220364648865 is a wasteful number, since it uses less digits than its factorization.

13220364648865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364081.

The product of its (nonzero) digits is 39813120, while the sum is 58.

The spelling of 13220364648865 in words is "thirteen trillion, two hundred twenty billion, three hundred sixty-four million, six hundred forty-eight thousand, eight hundred sixty-five".