13220554968 has 128 divisors (see below), whose sum is σ = 39364920000. Its totient is φ = 4147531776.

The previous prime is 13220554961. The next prime is 13220554969. The reversal of 13220554968 is 86945502231.

13220554968 is a `hidden beast` number, since 1 + 3 + 2 + 2 + 0 + 554 + 96 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220554961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275208 + ... + 319656.

Almost surely, 2^13220554968 is an apocalyptic number.

13220554968 is a gapful number since it is divisible by the number (18) 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 13220554968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19682460000).

13220554968 is an abundant number, since it is smaller than the sum of its proper divisors (26144365032).

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

13220554968 is an equidigital number, since it uses as much as digits as its factorization.

13220554968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44493 (or 44471 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 13220554968 in words is "thirteen billion, two hundred twenty million, five hundred fifty-four thousand, nine hundred sixty-eight".