1161160505 has 4 divisors (see below), whose sum is σ = 1393392612. Its totient is φ = 928928400.

The previous prime is 1161160501. The next prime is 1161160523. The reversal of 1161160505 is 5050611611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 214798336 + 946362169 = 14656^2 + 30763^2 .

It is not a de Polignac number, because 1161160505 - 2² = 1161160501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161160501) 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, 116116046 + ... + 116116055.

It is an arithmetic number, because the mean of its divisors is an integer number (348348153).

Almost surely, 2^1161160505 is an apocalyptic number.

It is an amenable number.

1161160505 is a deficient number, since it is larger than the sum of its proper divisors (232232107).

1161160505 is an equidigital number, since it uses as much as digits as its factorization.

1161160505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232232106.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1161160505 is about 34075.8052729499. The cubic root of 1161160505 is about 1051.0678493817.

The spelling of 1161160505 in words is "one billion, one hundred sixty-one million, one hundred sixty thousand, five hundred five".