1161114505 has 4 divisors (see below), whose sum is σ = 1393337412. Its totient is φ = 928891600.

The previous prime is 1161114481. The next prime is 1161114523. The reversal of 1161114505 is 5054111611.

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 665072521 + 496041984 = 25789^2 + 22272^2 .

It is not a de Polignac number, because 1161114505 - 2¹¹ = 1161112457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161114505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116111446 + ... + 116111455.

It is an arithmetic number, because the mean of its divisors is an integer number (348334353).

Almost surely, 2^1161114505 is an apocalyptic number.

It is an amenable number.

1161114505 is a deficient number, since it is larger than the sum of its proper divisors (232222907).

1161114505 is an equidigital number, since it uses as much as digits as its factorization.

1161114505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232222906.

The product of its (nonzero) digits is 600, while the sum is 25.

The square root of 1161114505 is about 34075.1303005579. The cubic root of 1161114505 is about 1051.0539696584.

The spelling of 1161114505 in words is "one billion, one hundred sixty-one million, one hundred fourteen thousand, five hundred five".