1161110159 has 16 divisors (see below), whose sum is σ = 1335242880. Its totient is φ = 998566560.

The previous prime is 1161110129. The next prime is 1161110161. The reversal of 1161110159 is 9510111611.

It is a cyclic number.

It is not a de Polignac number, because 1161110159 - 2⁸ = 1161109903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161110129) 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, 157964 + ... + 165150.

It is an arithmetic number, because the mean of its divisors is an integer number (83452680).

Almost surely, 2^1161110159 is an apocalyptic number.

1161110159 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1161110159 is a deficient number, since it is larger than the sum of its proper divisors (174132721).

1161110159 is a wasteful number, since it uses less digits than its factorization.

1161110159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7990.

The product of its (nonzero) digits is 270, while the sum is 26.

The square root of 1161110159 is about 34075.0665296489. The cubic root of 1161110159 is about 1051.0526583074.

The spelling of 1161110159 in words is "one billion, one hundred sixty-one million, one hundred ten thousand, one hundred fifty-nine".