1161330755 has 16 divisors (see below), whose sum is σ = 1532732544. Its totient is φ = 839349120.

The previous prime is 1161330739. The next prime is 1161330757. The reversal of 1161330755 is 5570331611.

It is not a de Polignac number, because 1161330755 - 2⁴ = 1161330739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161330757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187016 + ... + 193125.

It is an arithmetic number, because the mean of its divisors is an integer number (95795784).

Almost surely, 2^1161330755 is an apocalyptic number.

1161330755 is a deficient number, since it is larger than the sum of its proper divisors (371401789).

1161330755 is a wasteful number, since it uses less digits than its factorization.

1161330755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380206.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 1161330755 is about 34078.3032881627. The cubic root of 1161330755 is about 1051.1192162558.

The spelling of 1161330755 in words is "one billion, one hundred sixty-one million, three hundred thirty thousand, seven hundred fifty-five".