2561008695 has 32 divisors (see below), whose sum is σ = 4748958720. Its totient is φ = 1154254080.

The previous prime is 2561008679. The next prime is 2561008739. The reversal of 2561008695 is 5968001652.

2561008695 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2561008695 - 2⁴ = 2561008679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164310 + ... + 179219.

It is an arithmetic number, because the mean of its divisors is an integer number (148404960).

Almost surely, 2^2561008695 is an apocalyptic number.

2561008695 is a deficient number, since it is larger than the sum of its proper divisors (2187950025).

2561008695 is a wasteful number, since it uses less digits than its factorization.

2561008695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343615.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 2561008695 is about 50606.4096236830. The cubic root of 2561008695 is about 1368.1604050179.

The spelling of 2561008695 in words is "two billion, five hundred sixty-one million, eight thousand, six hundred ninety-five".