2561115330 has 24 divisors (see below), whose sum is σ = 6658900092. Its totient is φ = 682964064.

The previous prime is 2561115311. The next prime is 2561115341. The reversal of 2561115330 is 335111652.

2561115330 is a `hidden beast` number, since 2 + 5 + 611 + 15 + 3 + 30 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2553179841 + 7935489 = 50529^2 + 2817^2 .

It is a super-2 number, since 2×2561115330² = 13118623467122017800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2561115294 and 2561115303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14228329 + ... + 14228508.

Almost surely, 2^2561115330 is an apocalyptic number.

2561115330 is an abundant number, since it is smaller than the sum of its proper divisors (4097784762).

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

2561115330 is a wasteful number, since it uses less digits than its factorization.

2561115330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28456850 (or 28456847 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 2561115330 is about 50607.4631847912. The cubic root of 2561115330 is about 1368.1793938588.

Adding to 2561115330 its reverse (335111652), we get a palindrome (2896226982).

The spelling of 2561115330 in words is "two billion, five hundred sixty-one million, one hundred fifteen thousand, three hundred thirty".