2561041516 has 24 divisors (see below), whose sum is σ = 4890654720. Its totient is φ = 1163778000.

The previous prime is 2561041477. The next prime is 2561041519. The reversal of 2561041516 is 6151401652.

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 7 ways as a sum of consecutive naturals, for example, 215941 + ... + 227491.

It is an arithmetic number, because the mean of its divisors is an integer number (203777280).

Almost surely, 2^2561041516 is an apocalyptic number.

It is an amenable number.

2561041516 is a deficient number, since it is larger than the sum of its proper divisors (2329613204).

2561041516 is a wasteful number, since it uses less digits than its factorization.

2561041516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605 (or 16603 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2561041516 is about 50606.7338997490. The cubic root of 2561041516 is about 1368.1662496162.

The spelling of 2561041516 in words is "two billion, five hundred sixty-one million, forty-one thousand, five hundred sixteen".