2561858716 has 6 divisors (see below), whose sum is σ = 4483252760. Its totient is φ = 1280929356.

The previous prime is 2561858683. The next prime is 2561858737. The reversal of 2561858716 is 6178581652.

2561858716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2561858716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320232336 + ... + 320232343.

Almost surely, 2^2561858716 is an apocalyptic number.

It is an amenable number.

2561858716 is a deficient number, since it is larger than the sum of its proper divisors (1921394044).

2561858716 is a wasteful number, since it uses less digits than its factorization.

2561858716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640464683 (or 640464681 counting only the distinct ones).

The product of its digits is 806400, while the sum is 49.

The square root of 2561858716 is about 50614.8072800836. The cubic root of 2561858716 is about 1368.3117563762.

The spelling of 2561858716 in words is "two billion, five hundred sixty-one million, eight hundred fifty-eight thousand, seven hundred sixteen".