13563431504464 has 20 divisors (see below), whose sum is σ = 26639136878356. Its totient is φ = 6688815535872.

The previous prime is 13563431504387. The next prime is 13563431504471. The reversal of 13563431504464 is 46440513436531.

It can be written as a sum of positive squares in 2 ways, for example, as 3165979662400 + 10397451842064 = 1779320^2 + 3224508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5806262319 + ... + 5806264654.

Almost surely, 2^{13563431504464} is an apocalyptic number.

It is an amenable number.

13563431504464 is a deficient number, since it is larger than the sum of its proper divisors (13075705373892).

13563431504464 is a wasteful number, since it uses less digits than its factorization.

13563431504464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612527054 (or 11612527048 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 13563431504464 in words is "thirteen trillion, five hundred sixty-three billion, four hundred thirty-one million, five hundred four thousand, four hundred sixty-four".