2561768323056 has 30 divisors (see below), whose sum is σ = 7169393293400. Its totient is φ = 853922774304.

The previous prime is 2561768323031. The next prime is 2561768323123. The reversal of 2561768323056 is 6503238671652.

2561768323056 is a `hidden beast` number, since 2 + 561 + 7 + 6 + 8 + 3 + 23 + 0 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2561768322993 and 2561768323011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8895028756 + ... + 8895029043.

Almost surely, 2^{2561768323056} is an apocalyptic number.

It is an amenable number.

2561768323056 is an abundant number, since it is smaller than the sum of its proper divisors (4607624970344).

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

2561768323056 is a wasteful number, since it uses less digits than its factorization.

2561768323056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17790057813 (or 17790057804 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 2561768323056 in words is "two trillion, five hundred sixty-one billion, seven hundred sixty-eight million, three hundred twenty-three thousand, fifty-six".