1165500011 has 8 divisors (see below), whose sum is σ = 1257456144. Its totient is φ = 1073872800.

The previous prime is 1165500001. The next prime is 1165500013. The reversal of 1165500011 is 1100055611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1165500011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165500013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74840 + ... + 89061.

It is an arithmetic number, because the mean of its divisors is an integer number (157182018).

Almost surely, 2^1165500011 is an apocalyptic number.

1165500011 is a deficient number, since it is larger than the sum of its proper divisors (91956133).

1165500011 is a wasteful number, since it uses less digits than its factorization.

1165500011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164461.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 1165500011 is about 34139.4201913272. The cubic root of 1165500011 is about 1052.3755770190.

Adding to 1165500011 its reverse (1100055611), we get a palindrome (2265555622).

The spelling of 1165500011 in words is "one billion, one hundred sixty-five million, five hundred thousand, eleven".