2566226021311 has 4 divisors (see below), whose sum is σ = 2654716573800. Its totient is φ = 2477735468824.

The previous prime is 2566226021291. The next prime is 2566226021339. The reversal of 2566226021311 is 1131206226652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2566226021311 - 2¹³ = 2566226013119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566226021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44245276201 + ... + 44245276258.

It is an arithmetic number, because the mean of its divisors is an integer number (663679143450).

Almost surely, 2^{2566226021311} is an apocalyptic number.

2566226021311 is a deficient number, since it is larger than the sum of its proper divisors (88490552489).

2566226021311 is an equidigital number, since it uses as much as digits as its factorization.

2566226021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88490552488.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 2566226021311 in words is "two trillion, five hundred sixty-six billion, two hundred twenty-six million, twenty-one thousand, three hundred eleven".