2108563636 has 6 divisors (see below), whose sum is σ = 3689986370. Its totient is φ = 1054281816.

The previous prime is 2108563631. The next prime is 2108563643. The reversal of 2108563636 is 6363658012.

It can be written as a sum of positive squares in only one way, i.e., 1148803236 + 959760400 = 33894^2 + 30980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108563631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263570451 + ... + 263570458.

Almost surely, 2^2108563636 is an apocalyptic number.

It is an amenable number.

2108563636 is a deficient number, since it is larger than the sum of its proper divisors (1581422734).

2108563636 is a wasteful number, since it uses less digits than its factorization.

2108563636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527140913 (or 527140911 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2108563636 is about 45919.0988151989. The cubic root of 2108563636 is about 1282.3175047957.

The spelling of 2108563636 in words is "two billion, one hundred eight million, five hundred sixty-three thousand, six hundred thirty-six".