2565566116212 has 96 divisors (see below), whose sum is σ = 6688128674304. Its totient is φ = 758713737600.

The previous prime is 2565566116133. The next prime is 2565566116213. The reversal of 2565566116212 is 2126116655652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565566116213) 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, 6453598 + ... + 6839594.

It is an arithmetic number, because the mean of its divisors is an integer number (69668007024).

Almost surely, 2^{2565566116212} is an apocalyptic number.

2565566116212 is a gapful number since it is divisible by the number (22) 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 2565566116212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3344064337152).

2565566116212 is an abundant number, since it is smaller than the sum of its proper divisors (4122562558092).

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

2565566116212 is a wasteful number, since it uses less digits than its factorization.

2565566116212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387229 (or 387227 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 48.

The spelling of 2565566116212 in words is "two trillion, five hundred sixty-five billion, five hundred sixty-six million, one hundred sixteen thousand, two hundred twelve".