2563455785 has 12 divisors (see below), whose sum is σ = 3381220164. Its totient is φ = 1864331040.

The previous prime is 2563455779. The next prime is 2563455803. The reversal of 2563455785 is 5875543652.

2563455785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 991809049 + 1571646736 = 31493^2 + 39644^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2563455785 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2117954 + ... + 2119163.

It is an arithmetic number, because the mean of its divisors is an integer number (281768347).

Almost surely, 2^2563455785 is an apocalyptic number.

It is an amenable number.

2563455785 is a deficient number, since it is larger than the sum of its proper divisors (817764379).

2563455785 is a wasteful number, since it uses less digits than its factorization.

2563455785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237144 (or 4237133 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 50.

The square root of 2563455785 is about 50630.5815194730. The cubic root of 2563455785 is about 1368.5960336117.

The spelling of 2563455785 in words is "two billion, five hundred sixty-three million, four hundred fifty-five thousand, seven hundred eighty-five".