1311076161 has 12 divisors (see below), whose sum is σ = 1901324880. Its totient is φ = 870567000.

The previous prime is 1311076157. The next prime is 1311076183. The reversal of 1311076161 is 1616701131.

1311076161 is a `hidden beast` number, since 1 + 31 + 10 + 7 + 616 + 1 = 666.

It is not a de Polignac number, because 1311076161 - 2² = 1311076157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311077161) 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, 287931 + ... + 292448.

It is an arithmetic number, because the mean of its divisors is an integer number (158443740).

Almost surely, 2^1311076161 is an apocalyptic number.

It is an amenable number.

1311076161 is a deficient number, since it is larger than the sum of its proper divisors (590248719).

1311076161 is a wasteful number, since it uses less digits than its factorization.

1311076161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580636 (or 580633 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 1311076161 is about 36208.7856880067. The cubic root of 1311076161 is about 1094.4837223425.

Adding to 1311076161 its reverse (1616701131), we get a palindrome (2927777292).

The spelling of 1311076161 in words is "one billion, three hundred eleven million, seventy-six thousand, one hundred sixty-one".