1236220545560 has 512 divisors, whose sum is σ = 3937373798400. Its totient is φ = 336423352320.

The previous prime is 1236220545491. The next prime is 1236220545569. The reversal of 1236220545560 is 655450226321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236220545569) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 854332757 + ... + 854334203.

It is an arithmetic number, because the mean of its divisors is an integer number (7690183200).

Almost surely, 2^{1236220545560} is an apocalyptic number.

1236220545560 is a gapful number since it is divisible by the number (10) 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 1236220545560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968686899200).

1236220545560 is an abundant number, since it is smaller than the sum of its proper divisors (2701153252840).

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

1236220545560 is a wasteful number, since it uses less digits than its factorization.

1236220545560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631 (or 2627 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 1236220545560 in words is "one trillion, two hundred thirty-six billion, two hundred twenty million, five hundred forty-five thousand, five hundred sixty".