1161001563 has 16 divisors (see below), whose sum is σ = 1571387040. Its totient is φ = 762338304.

The previous prime is 1161001561. The next prime is 1161001571. The reversal of 1161001563 is 3651001611.

It is not a de Polignac number, because 1161001563 - 2¹ = 1161001561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161001561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173895 + ... + 180447.

It is an arithmetic number, because the mean of its divisors is an integer number (98211690).

Almost surely, 2^1161001563 is an apocalyptic number.

1161001563 is a deficient number, since it is larger than the sum of its proper divisors (410385477).

1161001563 is an equidigital number, since it uses as much as digits as its factorization.

1161001563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1161001563 is about 34073.4730105400. The cubic root of 1161001563 is about 1051.0198897619.

The spelling of 1161001563 in words is "one billion, one hundred sixty-one million, one thousand, five hundred sixty-three".