13221667564 has 12 divisors (see below), whose sum is σ = 26443335184. Its totient is φ = 5666428944.

The previous prime is 13221667561. The next prime is 13221667583. The reversal of 13221667564 is 46576612231.

13221667564 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 13221667564.

It is not an unprimeable number, because it can be changed into a prime (13221667561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236101179 + ... + 236101234.

Almost surely, 2^13221667564 is an apocalyptic number.

13221667564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13221667564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13221667564 is a wasteful number, since it uses less digits than its factorization.

13221667564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472202424 (or 472202422 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

It can be divided in two parts, 13221667 and 564, that added together give a palindrome (13222231).

The spelling of 13221667564 in words is "thirteen billion, two hundred twenty-one million, six hundred sixty-seven thousand, five hundred sixty-four".