1161632755 has 4 divisors (see below), whose sum is σ = 1393959312. Its totient is φ = 929306200.

The previous prime is 1161632753. The next prime is 1161632783. The reversal of 1161632755 is 5572361611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5572361611 = 12347 ⋅451313.

It is not a de Polignac number, because 1161632755 - 2¹ = 1161632753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161632753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116163271 + ... + 116163280.

It is an arithmetic number, because the mean of its divisors is an integer number (348489828).

Almost surely, 2^1161632755 is an apocalyptic number.

1161632755 is a deficient number, since it is larger than the sum of its proper divisors (232326557).

1161632755 is an equidigital number, since it uses as much as digits as its factorization.

1161632755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232326556.

The product of its digits is 37800, while the sum is 37.

The square root of 1161632755 is about 34082.7339719102. The cubic root of 1161632755 is about 1051.2103216507.

The spelling of 1161632755 in words is "one billion, one hundred sixty-one million, six hundred thirty-two thousand, seven hundred fifty-five".