1320156611 has 2 divisors, whose sum is σ = 1320156612. Its totient is φ = 1320156610.

The previous prime is 1320156587. The next prime is 1320156653. The reversal of 1320156611 is 1166510231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320156611 - 2⁶ = 1320156547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320156011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660078305 + 660078306.

It is an arithmetic number, because the mean of its divisors is an integer number (660078306).

Almost surely, 2^1320156611 is an apocalyptic number.

1320156611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320156611 is an equidigital number, since it uses as much as digits as its factorization.

1320156611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1320156611 is about 36333.9594731981. The cubic root of 1320156611 is about 1097.0046916517.

Adding to 1320156611 its reverse (1166510231), we get a palindrome (2486666842).

The spelling of 1320156611 in words is "one billion, three hundred twenty million, one hundred fifty-six thousand, six hundred eleven".