2561301366 has 32 divisors (see below), whose sum is σ = 5523704928. Its totient is φ = 787084800.

The previous prime is 2561301349. The next prime is 2561301377. The reversal of 2561301366 is 6631031652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41566 + ... + 82766.

It is an arithmetic number, because the mean of its divisors is an integer number (172615779).

Almost surely, 2^2561301366 is an apocalyptic number.

2561301366 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2561301366 is an abundant number, since it is smaller than the sum of its proper divisors (2962403562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561301366 is a wasteful number, since it uses less digits than its factorization.

2561301366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42016.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 2561301366 is about 50609.3011807118. The cubic root of 2561301366 is about 1368.2125206319.

The spelling of 2561301366 in words is "two billion, five hundred sixty-one million, three hundred one thousand, three hundred sixty-six".