1161162563 has 4 divisors (see below), whose sum is σ = 1266722808. Its totient is φ = 1055602320.

The previous prime is 1161162557. The next prime is 1161162631. The reversal of 1161162563 is 3652611611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1161162563 - 2⁴ = 1161162547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161162553) 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 3 ways as a sum of consecutive naturals, for example, 52780106 + ... + 52780127.

It is an arithmetic number, because the mean of its divisors is an integer number (316680702).

Almost surely, 2^1161162563 is an apocalyptic number.

1161162563 is a deficient number, since it is larger than the sum of its proper divisors (105560245).

1161162563 is a wasteful number, since it uses less digits than its factorization.

1161162563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105560244.

The product of its digits is 6480, while the sum is 32.

The square root of 1161162563 is about 34075.8354703153. The cubic root of 1161162563 is about 1051.0684703399.

The spelling of 1161162563 in words is "one billion, one hundred sixty-one million, one hundred sixty-two thousand, five hundred sixty-three".