2561061303 has 12 divisors (see below), whose sum is σ = 3700300240. Its totient is φ = 1706917536.

The previous prime is 2561061289. The next prime is 2561061317. The reversal of 2561061303 is 3031601652.

2561061303 is a `hidden beast` number, since 256 + 106 + 1 + 303 = 666.

It is an interprime number because it is at equal distance from previous prime (2561061289) and next prime (2561061317).

It is not a de Polignac number, because 2561061303 - 2⁴ = 2561061287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561061323) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 598 + ... + 71571.

Almost surely, 2^2561061303 is an apocalyptic number.

2561061303 is a deficient number, since it is larger than the sum of its proper divisors (1139238937).

2561061303 is a wasteful number, since it uses less digits than its factorization.

2561061303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76118 (or 76115 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 2561061303 is about 50606.9293970697. The cubic root of 2561061303 is about 1368.1697731613.

Adding to 2561061303 its reverse (3031601652), we get a palindrome (5592662955).

The spelling of 2561061303 in words is "two billion, five hundred sixty-one million, sixty-one thousand, three hundred three".