1161026811 has 32 divisors (see below), whose sum is σ = 2018900480. Its totient is φ = 645509088.

The previous prime is 1161026809. The next prime is 1161026827. The reversal of 1161026811 is 1186201611.

1161026811 is a `hidden beast` number, since 11 + 610 + 26 + 8 + 11 = 666.

It is not a de Polignac number, because 1161026811 - 2¹ = 1161026809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161026831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76021 + ... + 90006.

It is an arithmetic number, because the mean of its divisors is an integer number (63090640).

Almost surely, 2^1161026811 is an apocalyptic number.

1161026811 is a deficient number, since it is larger than the sum of its proper divisors (857873669).

1161026811 is a wasteful number, since it uses less digits than its factorization.

1161026811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166080 (or 166074 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1161026811 is about 34073.8435020178. The cubic root of 1161026811 is about 1051.0275084590.

The spelling of 1161026811 in words is "one billion, one hundred sixty-one million, twenty-six thousand, eight hundred eleven".