2104261153566 has 96 divisors (see below), whose sum is σ = 4982496067584. Its totient is φ = 588514555200.

The previous prime is 2104261153543. The next prime is 2104261153567. The reversal of 2104261153566 is 6653511624012.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104261153567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83334355 + ... + 83359601.

It is an arithmetic number, because the mean of its divisors is an integer number (51901000704).

Almost surely, 2^{2104261153566} is an apocalyptic number.

2104261153566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2104261153566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2491248033792).

2104261153566 is an abundant number, since it is smaller than the sum of its proper divisors (2878234914018).

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

2104261153566 is a wasteful number, since it uses less digits than its factorization.

2104261153566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34118 (or 34107 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

Adding to 2104261153566 its reverse (6653511624012), we get a palindrome (8757772777578).

The spelling of 2104261153566 in words is "two trillion, one hundred four billion, two hundred sixty-one million, one hundred fifty-three thousand, five hundred sixty-six".