1139266161 has 16 divisors (see below), whose sum is σ = 1841238720. Its totient is φ = 690464160.

The previous prime is 1139266157. The next prime is 1139266187. The reversal of 1139266161 is 1616629311.

1139266161 is a `hidden beast` number, since 1 + 1 + 39 + 2 + 6 + 616 + 1 = 666.

It is not a de Polignac number, because 1139266161 - 2² = 1139266157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139262161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1917660 + ... + 1918253.

It is an arithmetic number, because the mean of its divisors is an integer number (115077420).

Almost surely, 2^1139266161 is an apocalyptic number.

1139266161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1139266161 is a deficient number, since it is larger than the sum of its proper divisors (701972559).

1139266161 is a wasteful number, since it uses less digits than its factorization.

1139266161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835933 (or 3835927 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 1139266161 is about 33753.0170651455. The cubic root of 1139266161 is about 1044.4197265284.

The spelling of 1139266161 in words is "one billion, one hundred thirty-nine million, two hundred sixty-six thousand, one hundred sixty-one".