13263551342561 has 16 divisors (see below), whose sum is σ = 14399034914880. Its totient is φ = 12144606576960.

The previous prime is 13263551342557. The next prime is 13263551342563. The reversal of 13263551342561 is 16524315536231.

It is not a de Polignac number, because 13263551342561 - 2² = 13263551342557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13263551342563) 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, 2303930 + ... + 5642268.

It is an arithmetic number, because the mean of its divisors is an integer number (899939682180).

Almost surely, 2^{13263551342561} is an apocalyptic number.

It is an amenable number.

13263551342561 is a deficient number, since it is larger than the sum of its proper divisors (1135483572319).

13263551342561 is a wasteful number, since it uses less digits than its factorization.

13263551342561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340816.

The product of its digits is 1944000, while the sum is 47.

Adding to 13263551342561 its reverse (16524315536231), we get a palindrome (29787866878792).

The spelling of 13263551342561 in words is "thirteen trillion, two hundred sixty-three billion, five hundred fifty-one million, three hundred forty-two thousand, five hundred sixty-one".