13232561664 has 320 divisors, whose sum is σ = 42674125824. Its totient is φ = 3561947136.

The previous prime is 13232561653. The next prime is 13232561681. The reversal of 13232561664 is 46616523231.

It is a congruent 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, 18052242 + ... + 18052974.

Almost surely, 2^13232561664 is an apocalyptic number.

13232561664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13232561664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21337062912).

13232561664 is an abundant number, since it is smaller than the sum of its proper divisors (29441564160).

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

13232561664 is an equidigital number, since it uses as much as digits as its factorization.

13232561664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 841 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The spelling of 13232561664 in words is "thirteen billion, two hundred thirty-two million, five hundred sixty-one thousand, six hundred sixty-four".