13561643322 has 64 divisors (see below), whose sum is σ = 30868992000. Its totient is φ = 4410960624.

The previous prime is 13561643321. The next prime is 13561643351. The reversal of 13561643322 is 22334616531.

13561643322 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 1 + 643 + 3 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (13561643321) 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, 2921079 + ... + 2925717.

It is an arithmetic number, because the mean of its divisors is an integer number (482328000).

Almost surely, 2^13561643322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13561643322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15434496000).

13561643322 is an abundant number, since it is smaller than the sum of its proper divisors (17307348678).

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

13561643322 is a wasteful number, since it uses less digits than its factorization.

13561643322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5952 (or 5946 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The spelling of 13561643322 in words is "thirteen billion, five hundred sixty-one million, six hundred forty-three thousand, three hundred twenty-two".