1161356011 has 16 divisors (see below), whose sum is σ = 1220400000. Its totient is φ = 1103671296.

The previous prime is 1161355991. The next prime is 1161356029. The reversal of 1161356011 is 1106531611.

It is a cyclic number.

It is not a de Polignac number, because 1161356011 - 2⁹ = 1161355499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161356081) 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, 1028095 + ... + 1029223.

It is an arithmetic number, because the mean of its divisors is an integer number (76275000).

Almost surely, 2^1161356011 is an apocalyptic number.

1161356011 is a deficient number, since it is larger than the sum of its proper divisors (59043989).

1161356011 is a wasteful number, since it uses less digits than its factorization.

1161356011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1161356011 is about 34078.6738445028. The cubic root of 1161356011 is about 1051.1268359267.

Adding to 1161356011 its reverse (1106531611), we get a palindrome (2267887622).

The spelling of 1161356011 in words is "one billion, one hundred sixty-one million, three hundred fifty-six thousand, eleven".