2561128807522 has 8 divisors (see below), whose sum is σ = 4008723350976. Its totient is φ = 1224887690532.

The previous prime is 2561128807519. The next prime is 2561128807547. The reversal of 2561128807522 is 2257088211652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27838356558 + ... + 27838356649.

It is an arithmetic number, because the mean of its divisors is an integer number (501090418872).

Almost surely, 2^{2561128807522} is an apocalyptic number.

2561128807522 is a deficient number, since it is larger than the sum of its proper divisors (1447594543454).

2561128807522 is a wasteful number, since it uses less digits than its factorization.

2561128807522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55676713232.

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 2561128807522 in words is "two trillion, five hundred sixty-one billion, one hundred twenty-eight million, eight hundred seven thousand, five hundred twenty-two".