1161064649 has 2 divisors, whose sum is σ = 1161064650. Its totient is φ = 1161064648.

The previous prime is 1161064603. The next prime is 1161064687. The reversal of 1161064649 is 9464601611.

It is an a-pointer prime, because the next prime (1161064687) can be obtained adding 1161064649 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1139535049 + 21529600 = 33757^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161064649 - 2²⁰ = 1160016073 is a prime.

It is a super-2 number, since 2×1161064649² = 2696142238314986402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1161069649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580532324 + 580532325.

It is an arithmetic number, because the mean of its divisors is an integer number (580532325).

Almost surely, 2^1161064649 is an apocalyptic number.

It is an amenable number.

1161064649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161064649 is an equidigital number, since it uses as much as digits as its factorization.

1161064649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1161064649 is about 34074.3987327730. The cubic root of 1161064649 is about 1051.0389260383.

The spelling of 1161064649 in words is "one billion, one hundred sixty-one million, sixty-four thousand, six hundred forty-nine".