2561066727526 has 4 divisors (see below), whose sum is σ = 3841600091292. Its totient is φ = 1280533363762.

The previous prime is 2561066727523. The next prime is 2561066727529. The reversal of 2561066727526 is 6257276601652.

2561066727526 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2561066727523) and next prime (2561066727529).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561066727523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640266681880 + ... + 640266681883.

It is an arithmetic number, because the mean of its divisors is an integer number (960400022823).

Almost surely, 2^{2561066727526} is an apocalyptic number.

2561066727526 is a deficient number, since it is larger than the sum of its proper divisors (1280533363766).

2561066727526 is a wasteful number, since it uses less digits than its factorization.

2561066727526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280533363765.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 2561066727526 in words is "two trillion, five hundred sixty-one billion, sixty-six million, seven hundred twenty-seven thousand, five hundred twenty-six".