2561061330 has 48 divisors (see below), whose sum is σ = 6733598040. Its totient is φ = 675273984.

The previous prime is 2561061329. The next prime is 2561061331. The reversal of 2561061330 is 331601652.

2561061330 is a `hidden beast` number, since 2 + 5 + 6 + 10 + 613 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (2561061329) and next prime (2561061331).

It can be written as a sum of positive squares in 4 ways, for example, as 2082370689 + 478690641 = 45633^2 + 21879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2561061294 and 2561061303.

It is not an unprimeable number, because it can be changed into a prime (2561061331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151857 + ... + 167876.

Almost surely, 2^2561061330 is an apocalyptic number.

2561061330 is an abundant number, since it is smaller than the sum of its proper divisors (4172536710).

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

2561061330 is a wasteful number, since it uses less digits than its factorization.

2561061330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319835 (or 319832 counting only the distinct ones).

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

The square root of 2561061330 is about 50606.9296638316. The cubic root of 2561061330 is about 1368.1697779693.

Adding to 2561061330 its reverse (331601652), we get a palindrome (2892662982).

The spelling of 2561061330 in words is "two billion, five hundred sixty-one million, sixty-one thousand, three hundred thirty".