2563663653 has 12 divisors (see below), whose sum is σ = 3763776588. Its totient is φ = 1681090560.

The previous prime is 2563663643. The next prime is 2563663691. The reversal of 2563663653 is 3563663652.

2563663653 is a `hidden beast` number, since 2 + 5 + 6 + 3 + 6 + 636 + 5 + 3 = 666.

2563663653 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 586705284 + 1976958369 = 24222^2 + 44463^2 .

It is not a de Polignac number, because 2563663653 - 2⁶ = 2563663589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2563663599 and 2563663608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563663633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2334300 + ... + 2335397.

It is an arithmetic number, because the mean of its divisors is an integer number (313648049).

Almost surely, 2^2563663653 is an apocalyptic number.

It is an amenable number.

2563663653 is a deficient number, since it is larger than the sum of its proper divisors (1200112935).

2563663653 is a wasteful number, since it uses less digits than its factorization.

2563663653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669764 (or 4669761 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 45.

The square root of 2563663653 is about 50632.6342688192. The cubic root of 2563663653 is about 1368.6330252947.

Subtracting 2563663653 from its reverse (3563663652), we obtain a palindrome (999999999).

The spelling of 2563663653 in words is "two billion, five hundred sixty-three million, six hundred sixty-three thousand, six hundred fifty-three".