1563682645 has 16 divisors (see below), whose sum is σ = 2147005440. Its totient is φ = 1070976384.

The previous prime is 1563682643. The next prime is 1563682709. The reversal of 1563682645 is 5462863651.

It is a cyclic number.

It is not a de Polignac number, because 1563682645 - 2¹ = 1563682643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1563682595 and 1563682604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563682643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4321 + ... + 56089.

It is an arithmetic number, because the mean of its divisors is an integer number (134187840).

Almost surely, 2^1563682645 is an apocalyptic number.

It is an amenable number.

1563682645 is a deficient number, since it is larger than the sum of its proper divisors (583322795).

1563682645 is an equidigital number, since it uses as much as digits as its factorization.

1563682645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52644.

The product of its digits is 1036800, while the sum is 46.

The square root of 1563682645 is about 39543.4273299622. The cubic root of 1563682645 is about 1160.6899000009.

The spelling of 1563682645 in words is "one billion, five hundred sixty-three million, six hundred eighty-two thousand, six hundred forty-five".