1153791181 has 4 divisors (see below), whose sum is σ = 1154216700. Its totient is φ = 1153365664.

The previous prime is 1153791161. The next prime is 1153791193. The reversal of 1153791181 is 1811973511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1811973511 = 23 ⋅78781457.

It can be written as a sum of positive squares in 2 ways, for example, as 1136701225 + 17089956 = 33715^2 + 4134^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153791181 - 2⁷ = 1153791053 is a prime.

It is a super-2 number, since 2×1153791181² = 2662468178706749522, which contains 22 as substring.

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 1153791181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153791161) 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, 208666 + ... + 214123.

It is an arithmetic number, because the mean of its divisors is an integer number (288554175).

Almost surely, 2^1153791181 is an apocalyptic number.

It is an amenable number.

1153791181 is a deficient number, since it is larger than the sum of its proper divisors (425519).

1153791181 is an equidigital number, since it uses as much as digits as its factorization.

1153791181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425518.

The product of its digits is 7560, while the sum is 37.

The square root of 1153791181 is about 33967.5018363141. The cubic root of 1153791181 is about 1048.8395890912.

The spelling of 1153791181 in words is "one billion, one hundred fifty-three million, seven hundred ninety-one thousand, one hundred eighty-one".