2561420382285 has 32 divisors (see below), whose sum is σ = 4124636272512. Its totient is φ = 1357304083200.

The previous prime is 2561420382251. The next prime is 2561420382289. The reversal of 2561420382285 is 5822830241652.

It is not a de Polignac number, because 2561420382285 - 2⁸ = 2561420382029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561420382289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58657710 + ... + 58701360.

It is an arithmetic number, because the mean of its divisors is an integer number (128894883516).

Almost surely, 2^{2561420382285} is an apocalyptic number.

It is an amenable number.

2561420382285 is a deficient number, since it is larger than the sum of its proper divisors (1563215890227).

2561420382285 is a wasteful number, since it uses less digits than its factorization.

2561420382285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68733.

The product of its (nonzero) digits is 1843200, while the sum is 48.

The spelling of 2561420382285 in words is "two trillion, five hundred sixty-one billion, four hundred twenty million, three hundred eighty-two thousand, two hundred eighty-five".