2561095872 has 42 divisors (see below), whose sum is σ = 7340920548. Its totient is φ = 853698432.

The previous prime is 2561095871. The next prime is 2561095877. The reversal of 2561095872 is 2785901652.

2561095872 is a `hidden beast` number, since 2 + 5 + 61 + 0 + 9 + 587 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (2561095871) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2222598 + ... + 2223749.

Almost surely, 2^2561095872 is an apocalyptic number.

It is an amenable number.

2561095872 is an abundant number, since it is smaller than the sum of its proper divisors (4779824676).

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

2561095872 is a wasteful number, since it uses less digits than its factorization.

2561095872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446365 (or 4446352 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 2561095872 is about 50607.2709400537. The cubic root of 2561095872 is about 1368.1759289489.

The spelling of 2561095872 in words is "two billion, five hundred sixty-one million, ninety-five thousand, eight hundred seventy-two".