81160011 has 12 divisors (see below), whose sum is σ = 117478192. Its totient is φ = 53992656.

The previous prime is 81160007. The next prime is 81160019. The reversal of 81160011 is 11006118.

It is not a de Polignac number, because 81160011 - 2² = 81160007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81160019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4876 + ... + 13641.

Almost surely, 2^81160011 is an apocalyptic number.

81160011 is a deficient number, since it is larger than the sum of its proper divisors (36318181).

81160011 is a wasteful number, since it uses less digits than its factorization.

81160011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19010 (or 19007 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 81160011 is about 9008.8851141526. The cubic root of 81160011 is about 432.9595920811.

Adding to 81160011 its reverse (11006118), we get a palindrome (92166129).

The spelling of 81160011 in words is "eighty-one million, one hundred sixty thousand, eleven".