2566451221843 has 24 divisors (see below), whose sum is σ = 2741019320592. Its totient is φ = 2402388882432.

The previous prime is 2566451221823. The next prime is 2566451221847. The reversal of 2566451221843 is 3481221546652.

2566451221843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2566451221843 - 2³³ = 2557861287251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2566451221847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21546096 + ... + 21664882.

It is an arithmetic number, because the mean of its divisors is an integer number (114209138358).

Almost surely, 2^{2566451221843} is an apocalyptic number.

2566451221843 is a deficient number, since it is larger than the sum of its proper divisors (174568098749).

2566451221843 is a wasteful number, since it uses less digits than its factorization.

2566451221843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119539 (or 119520 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 49.

The spelling of 2566451221843 in words is "two trillion, five hundred sixty-six billion, four hundred fifty-one million, two hundred twenty-one thousand, eight hundred forty-three".