13200161656 has 64 divisors (see below), whose sum is σ = 28196398080. Its totient is φ = 5734692480.

The previous prime is 13200161651. The next prime is 13200161657. The reversal of 13200161656 is 65616100231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13200161651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4769185 + ... + 4771951.

It is an arithmetic number, because the mean of its divisors is an integer number (440568720).

Almost surely, 2^13200161656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13200161656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14098199040).

13200161656 is an abundant number, since it is smaller than the sum of its proper divisors (14996236424).

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

13200161656 is a wasteful number, since it uses less digits than its factorization.

13200161656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164 (or 5160 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 13200161656 its reverse (65616100231), we get a palindrome (78816261887).

The spelling of 13200161656 in words is "thirteen billion, two hundred million, one hundred sixty-one thousand, six hundred fifty-six".