1012005563 has 16 divisors (see below), whose sum is σ = 1088640000. Its totient is φ = 937352832.

The previous prime is 1012005541. The next prime is 1012005619. The reversal of 1012005563 is 3655002101.

It is a cyclic number.

It is not a de Polignac number, because 1012005563 - 2⁶ = 1012005499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012005503) 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, 481088 + ... + 483186.

It is an arithmetic number, because the mean of its divisors is an integer number (68040000).

Almost surely, 2^1012005563 is an apocalyptic number.

1012005563 is a deficient number, since it is larger than the sum of its proper divisors (76634437).

1012005563 is a wasteful number, since it uses less digits than its factorization.

1012005563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1012005563 is about 31812.0348767569. The cubic root of 1012005563 is about 1003.9859454629.

Adding to 1012005563 its reverse (3655002101), we get a palindrome (4667007664).

The spelling of 1012005563 in words is "one billion, twelve million, five thousand, five hundred sixty-three".