1177851361649 has 2 divisors, whose sum is σ = 1177851361650. Its totient is φ = 1177851361648.

The previous prime is 1177851361543. The next prime is 1177851361679. The reversal of 1177851361649 is 9461631587711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 927908358400 + 249943003249 = 963280^2 + 499943^2 .

It is a cyclic number.

It is not a de Polignac number, because 1177851361649 - 2⁴⁰ = 78339733873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1177851361679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 588925680824 + 588925680825.

It is an arithmetic number, because the mean of its divisors is an integer number (588925680825).

Almost surely, 2^{1177851361649} is an apocalyptic number.

It is an amenable number.

1177851361649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1177851361649 is an equidigital number, since it uses as much as digits as its factorization.

1177851361649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 59.

The spelling of 1177851361649 in words is "one trillion, one hundred seventy-seven billion, eight hundred fifty-one million, three hundred sixty-one thousand, six hundred forty-nine".