2561011330 has 32 divisors (see below), whose sum is σ = 4869691200. Its totient is φ = 967038912.

The previous prime is 2561011309. The next prime is 2561011333. The reversal of 2561011330 is 331101652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2561011333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29956 + ... + 77584.

It is an arithmetic number, because the mean of its divisors is an integer number (152177850).

Almost surely, 2^2561011330 is an apocalyptic number.

2561011330 is a deficient number, since it is larger than the sum of its proper divisors (2308679870).

2561011330 is a wasteful number, since it uses less digits than its factorization.

2561011330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47938.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 2561011330 is about 50606.4356579279. The cubic root of 2561011330 is about 1368.1608742473.

Adding to 2561011330 its reverse (331101652), we get a palindrome (2892112982).

The spelling of 2561011330 in words is "two billion, five hundred sixty-one million, eleven thousand, three hundred thirty".