2561041515 has 32 divisors (see below), whose sum is σ = 4282223616. Its totient is φ = 1305722880.

The previous prime is 2561041477. The next prime is 2561041519. The reversal of 2561041515 is 5151401652.

It is not a de Polignac number, because 2561041515 - 2¹⁸ = 2560779371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2561041519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11926 + ... + 72555.

It is an arithmetic number, because the mean of its divisors is an integer number (133819488).

Almost surely, 2^2561041515 is an apocalyptic number.

2561041515 is a deficient number, since it is larger than the sum of its proper divisors (1721182101).

2561041515 is a wasteful number, since it uses less digits than its factorization.

2561041515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84579.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 2561041515 is about 50606.7338898688. The cubic root of 2561041515 is about 1368.1662494381.

The spelling of 2561041515 in words is "two billion, five hundred sixty-one million, forty-one thousand, five hundred fifteen".