1161005611 has 2 divisors, whose sum is σ = 1161005612. Its totient is φ = 1161005610.

The previous prime is 1161005603. The next prime is 1161005617. The reversal of 1161005611 is 1165001611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161005611 - 2³ = 1161005603 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161005617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580502805 + 580502806.

It is an arithmetic number, because the mean of its divisors is an integer number (580502806).

Almost surely, 2^1161005611 is an apocalyptic number.

1161005611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161005611 is an equidigital number, since it uses as much as digits as its factorization.

1161005611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 1161005611 is about 34073.5324115361. The cubic root of 1161005611 is about 1051.0211112715.

The spelling of 1161005611 in words is "one billion, one hundred sixty-one million, five thousand, six hundred eleven".