13643623656464 has 40 divisors (see below), whose sum is σ = 27292646135040. Its totient is φ = 6600447216000.

The previous prime is 13643623656461. The next prime is 13643623656493. The reversal of 13643623656464 is 46465632634631.

It is a super-2 number, since 2×13643623656464² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13643623656461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209387 + ... + 5227914.

It is an arithmetic number, because the mean of its divisors is an integer number (682316153376).

Almost surely, 2^{13643623656464} is an apocalyptic number.

It is an amenable number.

13643623656464 is an abundant number, since it is smaller than the sum of its proper divisors (13649022478576).

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

13643623656464 is a wasteful number, since it uses less digits than its factorization.

13643623656464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442399 (or 5442393 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 59.

The spelling of 13643623656464 in words is "thirteen trillion, six hundred forty-three billion, six hundred twenty-three million, six hundred fifty-six thousand, four hundred sixty-four".